Unknown & Unclassified nonprofits in Maryland
Unknown & Unclassified nonprofits in Maryland. Browse 10,672 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
- Soil and Water Conservation Society
EIN 521332669 · Headquarters: Silver Spring, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Sokol Baltimore Inc
EIN 520681640 · Headquarters: PERRY HALL, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Soles of Love Inc
EIN 815072380 · Headquarters: MYERSVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Solidarite Zeve Diaspo Corporation
EIN 821677760 · Headquarters: Gaithersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Solomon Northup Foundation
EIN 464307154 · Headquarters: Upper Marlboro, MD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N
- Solomons Island Cycling
EIN 811458581 · Headquarters: Lusby, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Solomons Island Yacht Club Inc
EIN 520577592 · Headquarters: Solomons, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- Solon E Summerfield Foundation Inc C/o Intentional Philanthropy
EIN 131797260 · Headquarters: BETHESDA, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF
- Someone Like Me-reality
EIN 423021626 · Headquarters: Baltimore, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Somers Cove Yacht Club Inc
EIN 521752172 · Headquarters: Crisfield, MD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N
- Somerset County Atv Committee
EIN 203819920 · Headquarters: BOX HORN ROAD, MD, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N
- Somerset County Extension Advisory Council Inc
EIN 521351775 · Headquarters: Princess Anne, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- Somerset County Historical Society
EIN 526061428 · Headquarters: PRINCESS ANNE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Somerset County Hitorical Trust Incorporated
EIN 521515095 · Headquarters: Princess Anne, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Somerset Elementary School Pta Inc
EIN 526002008 · Headquarters: CHEVY CHASE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Songwriters Association of Washington Inc
EIN 521304143 · Headquarters: BETHESDA, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Sonnyview Ata Inc
EIN 921501825 · Headquarters: Salisbury, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- Sons & Daughters Pearl Harbor Survivors
EIN 061838600 · Headquarters: Bowie, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- Sons of Black Caesar Motorcycle Club Maryland
EIN 923349345 · Headquarters: Bowie, MD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N
- Sons of Black Caesar Motorcycle Club Maryland Llc
EIN 471446831 · Headquarters: Bowie, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Sons of Black Caesar Motorcycle Club Virginia
EIN 934973100 · Headquarters: Bowie, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Sons of Confederate Veterans Inc
EIN 455028633 · Headquarters: MOUNT AIRY, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Sons of Confederate Veterans Inc
EIN 581448754 · Headquarters: Westminster, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Sons of Confederate Veterans Inc
EIN 581468835 · Headquarters: Germantown, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Sons of Confederate Veterans Inc
EIN 581809555 · Headquarters: Catonsville, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Sons of Confederate Veterans Inc
EIN 582025799 · Headquarters: Gwynn Oak, MD, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- Sons of Confederate Veterans Inc
EIN 582283831 · Headquarters: Bowie, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Sons of Confederate Veterans Inc
EIN 582436059 · Headquarters: CATONSVILLE, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Sons of Confederate Veterans Inc
EIN 640766417 · Headquarters: LEXINGTON PARK, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Sons of Union Veterans of the Civil War
EIN 237347212 · Headquarters: Ocean City, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Sons of Union Veterans of the Civil War
EIN 262111218 · Headquarters: Waldorf, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Sons of Union Veterans of the Civil War
EIN 521917509 · Headquarters: Sykesville, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Sons of Union Veterans of the Civil War
EIN 521924783 · Headquarters: Ocean City, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Sons of Union Veterans of the Civil War
EIN 522341059 · Headquarters: Crofton, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- Sons of Union Veterans of the Civil War
EIN 711052747 · Headquarters: HOLLYWOOD, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- Sons of Unions Veterans of the Civil War
EIN 452450897 · Headquarters: Crofton, MD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N
- Soroptimist International of the Americas Inc
EIN 237043198 · Headquarters: CHESTERTOWN, MD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N
- Soul in Motion Players Inc
EIN 521842336 · Headquarters: Frederick, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Soul Partners Limited
EIN 814040004 · Headquarters: Ellicott City, MD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-PF
- Soul Prosper Ministry Corp
EIN 851273044 · Headquarters: WALDORF, MD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N
- South Baltimore Business Association Inc
EIN 521208789 · Headquarters: BALTIMORE, MD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- South Baltimore Industrial Mutual Aid Plan Inc
EIN 521815412 · Headquarters: Baltimore, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- South Baltimore Learning Corporation
EIN 521745263 · Headquarters: BALTIMORE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- South Baltimore Little League Inc
EIN 521614753 · Headquarters: Baltimore, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- South Baltimore Network Inc
EIN 471160257 · Headquarters: BALTIMORE, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- South Baltimore Pigeon Fanciers Social Club Incorporated
EIN 526113853 · Headquarters: Baltimore, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- South Carolina Oncology Society
EIN 570732587 · Headquarters: ROCKVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- South Carolina State University PAD Prelaw Chapter
EIN 450477853 · Headquarters: TOWSON, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- South Carroll Buisness Association Inc
EIN 521958484 · Headquarters: SYKESVILLE, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- South Carroll Swim Club Inc
EIN 521193277 · Headquarters: Sykesville, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- South County Deale Chapter 1887 Women of the Moose
EIN 521833340 · Headquarters: Shady Side, MD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N
- South County Little League Inc
EIN 825034580 · Headquarters: BOONSBORO, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- South County Moose Lodge #2279
EIN 521432785 · Headquarters: SHADY SIDE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- South County Youth Association Incorporated
EIN 521225368 · Headquarters: SHADY SIDE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- South Dakota State University Student Chapter
EIN 521410995 · Headquarters: Bethesda, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- South Eastern Fabricare Association
EIN 580532189 · Headquarters: LAUREL, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- South Florida Operating Engineers Apprentice and Training Trust
EIN 591500161 · Headquarters: SPARKS, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- South Mountain Heritage Society Inc
EIN 521874355 · Headquarters: BURKITTSVILLE, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- South Mountain Rod & Gun Club Inc
EIN 520802725 · Headquarters: Smithsburg, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- South River Music Boosters Inc
EIN 521581272 · Headquarters: Edgewater, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- South Shore Health Association
EIN 237254903 · Headquarters: Crownsville, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- South Shore PTA
EIN 526056546 · Headquarters: Crownsville, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- South Sudan Education and Empowerme Nt for Development Foundation
EIN 421811491 · Headquarters: Bowie, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- South Village Homes Corporation
EIN 521143226 · Headquarters: Montgomery Village, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Southeast Business & Professional Womens Organization
EIN 770716608 · Headquarters: Port Republic, MD, US · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-N
- Southeastern Washington Co Health & Community Services Corp
EIN 521071379 · Headquarters: KEEDYSVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Southern Arkansas University PAD Prelaw Chapter
EIN 943104065 · Headquarters: TOWSON, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Southern Asia Adventist Associ
EIN 521367288 · Headquarters: SILVER SPRING, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Southern College Health Association
EIN 237289783 · Headquarters: SILVER SPRING, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Southern Garrett County Rescue Squad Inc
EIN 237270168 · Headquarters: OAKLAND, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- Southern Illinois Unversity Student Chapter
EIN 521279020 · Headquarters: Bethesda, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- Southern Junior Bassmasters 4-H Club
EIN 451793233 · Headquarters: La Plata, MD, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N
- Southern Maryland Amateur Radio Club
EIN 521471073 · Headquarters: Cheltenham, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Southern Maryland Association of Realtors Inc
EIN 237371544 · Headquarters: HUGHESVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Southern Maryland Audubon Society
EIN 521130827 · Headquarters: Bryans Road, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Southern Maryland Center for Family Advocacy Inc
EIN 521190915 · Headquarters: HOLLYWOOD, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Southern Maryland Chapter Maryland Society of Professional Engineers
EIN 463257173 · Headquarters: Lexington Park, MD, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N
- Southern Maryland Crew of the Iomc
EIN 813547964 · Headquarters: Essex, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Southern Maryland Dental Society Inc
EIN 520966655 · Headquarters: COLLEGE PARK, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Southern Maryland Dirt Riders Club Inc
EIN 521545584 · Headquarters: Port Tobacco, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Southern Maryland Divas Inc
EIN 412580216 · Headquarters: Waldorf, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Southern Maryland Elec Cooperative Inc Workers Compensation Plan
EIN 521309853 · Headquarters: HUGHESVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Southern Maryland Gladiators Semi-pro Football Organization Inc
EIN 475461687 · Headquarters: Waldorf, MD, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N
- Southern Maryland Islamic Center Inc
EIN 521203957 · Headquarters: HUGHESVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Southern Maryland Knockouts Softball Club Inc
EIN 383891735 · Headquarters: Bryantown, MD, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N
- Southern Maryland Navy Alliance Inc
EIN 521767643 · Headquarters: HOLLYWOOD, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Southern Maryland Quarter Horse Association
EIN 521384777 · Headquarters: Nanjemoy, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Southern Maryland Recreational Fishing Organization
EIN 824371629 · Headquarters: Tall Timbers, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Southern Maryland Sailing Association Inc
EIN 521435822 · Headquarters: SOLOMONS, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Southern Maryland Tri-County Community Action Committee Inc
EIN 526066477 · Headquarters: Hughesville, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Southern Maryland Wolfe Pack Inc
EIN 861477758 · Headquarters: MECHANICSVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ
- Southern Maryland Womens League Inc
EIN 205281972 · Headquarters: Waldorf, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Southern Maryland Woodcarvers
EIN 521972795 · Headquarters: La Plata, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Southern Maryland Youth Organization Inc
EIN 521079538 · Headquarters: POMFRET, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Southern Methodist University PAD Prelaw Chapter
EIN 943133015 · Headquarters: TOWSON, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Southern Orthopaedic Association
EIN 630876120 · Headquarters: TOWSON, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Southern Prince George S County Beagle Club Inc
EIN 364727366 · Headquarters: Avenue, MD, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- Southern Prince Georges Business and Professional Womens Club of Pr
EIN 521045434 · Headquarters: BRANDYWINE, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Southern Prince Georges Rotary Foundation Incorporated
EIN 521510859 · Headquarters: Prince Frederick, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Southwest College Health Association
EIN 237146531 · Headquarters: SILVER SPRING, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N