Unknown & Unclassified nonprofits in Connecticut
Unknown & Unclassified nonprofits in Connecticut. Browse 7,402 public nonprofit profiles. Review organization identities, available filing years, and their complete CharitySense profiles.
Location refers to headquarters recorded in public sources, not an organization’s service area. Classification describes its reported category and does not assess its effectiveness.
Nonprofit profiles
- National Association of Letter Carriers
EIN 066099240 · Headquarters: FAIRFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- National Association of Letter Carriers #19
EIN 066069316 · Headquarters: NORTH HAVEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- National Association of Letter Carriers Branch 109
EIN 066099221 · Headquarters: Derby, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- National Association of Letter Carriers Branch 32
EIN 066068829 · Headquarters: STRATFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- National Association of Letter Carriers NALC 86
EIN 066063016 · Headquarters: East Hartford, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- National Association of Medicaid Program Integrity
EIN 363497582 · Headquarters: WEST HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- National Association of Negro Busin Ess and Professional Womens C
EIN 113016409 · Headquarters: Hamden, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- National Association of Neonatal Nurses
EIN 833088502 · Headquarters: Tolland, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Tax Professionals Inc
EIN 061249462 · Headquarters: SHELTON, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Women in Construction
EIN 237028843 · Headquarters: WINDSOR, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Black Nurses Association Inc
EIN 061555276 · Headquarters: HARTFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Business Travel Association Inc
EIN 061477324 · Headquarters: Terryville, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Camping Travelers Inc
EIN 237203261 · Headquarters: North Stoniington, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Cancer Awareness Foundation
EIN 020522300 · Headquarters: Farmington, CT, US · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-N
- National Community of Catechetical Leaders
EIN 520969407 · Headquarters: CHESHIRE, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Corvette Restorers Society Inc
EIN 061259147 · Headquarters: Danbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Council of 56 Clubs
EIN 611263883 · Headquarters: Stratford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Council of Family Relations
EIN 364676521 · Headquarters: Storrs, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Council of Jewish Women Incorporated
EIN 061078644 · Headquarters: Simsbury, CT, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- National Council of Negro Women Inc
EIN 066082740 · Headquarters: Bloomfield, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Council of Negro Women Inc
EIN 562344983 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Council of Negro Women Inc
EIN 853851373 · Headquarters: Oakdale, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Council of Negro Women Inc
EIN 911917271 · Headquarters: NEW LONDON, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Council of Teachers of English
EIN 821650099 · Headquarters: BRISTOL, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- National Education Association in Danbury
EIN 237107187 · Headquarters: DANBURY, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Electrical Contractors Association Inc & Ibew 90 Jatc
EIN 237311925 · Headquarters: WALLINGFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Electrical Contractors of Assn Inc
EIN 060672066 · Headquarters: BERLIN, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- National Emphysema Foundation Inc
EIN 237124098 · Headquarters: NORWALK, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF
- National Exchange Club
EIN 066047185 · Headquarters: WATERBURY, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Exchange Club
EIN 066049871 · Headquarters: Shelton, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- National Exchange Club
EIN 066049932 · Headquarters: STAMFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Exchange Club
EIN 066059482 · Headquarters: EASTON, CT, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N
- National Exchange Club
EIN 066069024 · Headquarters: Durham, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- National Exchange Club
EIN 066070235 · Headquarters: Brookfield, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Exchange Club
EIN 066070236 · Headquarters: DANBURY, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Exchange Club
EIN 066074539 · Headquarters: Glastonbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Exchange Club
EIN 066108609 · Headquarters: STAMFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Exchange Club
EIN 274298383 · Headquarters: Madison, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Exchange Club
EIN 460663567 · Headquarters: Madison, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Exchange Club Rockville Chapter
EIN 066108607 · Headquarters: ELLINGTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ
- National Faith Leaders Collaborative Inc
EIN 880525196 · Headquarters: GUILFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Federation for Biblio-poetry Therapy
EIN 205851311 · Headquarters: Norwalk, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Federation of the Blind of Connecticut
EIN 237320426 · Headquarters: West Hartford, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- National Football Foundation and College Hall of Fame Inc
EIN 061052646 · Headquarters: Ledyard, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Football Foundation and College Hall of Fame Inc
EIN 066180755 · Headquarters: Manchester, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Football Foundation and College Hall of Fame Inc
EIN 521964033 · Headquarters: TRUMBULL, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Guard Association of Connecticut Inc
EIN 061053856 · Headquarters: HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- National Helicopter Museum Inc
EIN 061001533 · Headquarters: Stratford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Infantrymans Association
EIN 471607400 · Headquarters: Newington, CT, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N
- National Islamic Committee on Girl Scouting Inc
EIN 922863514 · Headquarters: STAMFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Kitchen & Bath Assoc
EIN 061324643 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Labor Alliance of Health Care Coalitions Inc
EIN 141768443 · Headquarters: HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Org of Alpha Sigma Kappa Women in Technical Studies
EIN 473000794 · Headquarters: West Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Organization of Black Law Enforcement Executives Noble
EIN 273409694 · Headquarters: SUFFIELD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Organization of Mothers of Twins Clubs Inc
EIN 261319352 · Headquarters: STAMFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Retail Hobby Stores Association
EIN 363806750 · Headquarters: MILFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- National Rural Letter Carriers Association
EIN 237235406 · Headquarters: Bethel, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- National Rural Letter Carriers Association
EIN 237235407 · Headquarters: SOUTHBURY, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- National Rural Letter Carriers Association
EIN 237235408 · Headquarters: DEEP RIVER, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- National Rural Letter Carriers Association
EIN 237235409 · Headquarters: GUILFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- National Rural Letter Carriers Association
EIN 237235410 · Headquarters: LEDYARD, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- National Rural Letter Carriers Association
EIN 237235412 · Headquarters: South Windham, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- National Rural Letter Carriers Association
EIN 510247381 · Headquarters: EAST HAMPTON, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- National Rural Letter Carriers Association
EIN 581859164 · Headquarters: VERNON, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- National Rural Letter Carriers' Association
EIN 237235405 · Headquarters: Guilford, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- National Shooting Sports Foundation (NSSF)
EIN 060860132 · Headquarters: SHELTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Society Colonial Dames Xvii Century
EIN 237159780 · Headquarters: Bristol, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Society Colonial Dames Xvii Century
EIN 237407954 · Headquarters: Bristol, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society Colonial Dames Xvii Century
EIN 463272895 · Headquarters: East Lyme, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society Colonial Dames Xvii Century
EIN 472434643 · Headquarters: Plantsville, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society Colonial Dames Xvii Century
EIN 611734994 · Headquarters: New Fairfield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society Daughters of the Union 1861-1865
EIN 474497904 · Headquarters: Lisbon, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of New England Women
EIN 237062810 · Headquarters: Enfield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Children of the American Revolution
EIN 237248840 · Headquarters: Vernon, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Children of the American Revolution
EIN 260736603 · Headquarters: Cobalt, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Children of the American Revolution
EIN 262654869 · Headquarters: Wilton, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Children of the American Revolution
EIN 510659438 · Headquarters: Bridgeport, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Children of the American Revolution
EIN 882564213 · Headquarters: East Lyme, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Children of the American Revolution
EIN 900430830 · Headquarters: Danielson, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Children of the American Revolution
EIN 900430831 · Headquarters: Trumbull, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Children of the American Revolution
EIN 900430834 · Headquarters: GREENWICH, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Daughters of the American Revolution
EIN 056010639 · Headquarters: Norwich, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Society of the Daughters of the American Revolution
EIN 060934069 · Headquarters: Vernon, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Daughters of the American Revolution
EIN 066039157 · Headquarters: Newington, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Daughters of the American Revolution
EIN 066039158 · Headquarters: Simsbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Daughters of the American Revolution
EIN 066040565 · Headquarters: Fairfield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Daughters of the American Revolution
EIN 066041068 · Headquarters: Hamden, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Daughters of the American Revolution
EIN 066041253 · Headquarters: Bristol, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Daughters of the American Revolution
EIN 066044697 · Headquarters: East Hampton, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Daughters of the American Revolution
EIN 066045313 · Headquarters: Washington, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Daughters of the American Revolution
EIN 066045352 · Headquarters: Mystic, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Daughters of the American Revolution
EIN 066046467 · Headquarters: Darien, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Daughters of the American Revolution
EIN 066046540 · Headquarters: Danbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Daughters of the American Revolution
EIN 066046559 · Headquarters: Southington, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Daughters of the American Revolution
EIN 066046731 · Headquarters: Wallingford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Daughters of the American Revolution
EIN 066046896 · Headquarters: New Milford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Daughters of the American Revolution
EIN 066047529 · Headquarters: Thomaston, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Daughters of the American Revolution
EIN 066054343 · Headquarters: Glastonbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Daughters of the American Revolution
EIN 066054817 · Headquarters: Enfield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Society of the Daughters of the American Revolution
EIN 066056431 · Headquarters: Ashford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N