Nonprofits in Washington, District of Columbia
Nonprofits in Washington, District of Columbia. Browse 18,177 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
- Oneworld Movement
EIN 842956612 · Headquarters: Washington, DC, US · Civil Rights, Social Action & Advocacy · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- Oneworld United States
EIN 161661229 · Headquarters: WASHINGTON, DC, USA · International, Foreign Affairs & National Security · Latest available filing year: 2011 · Primary form: IRS Form 990-EZ
- Onicha Amari Development Union Incorporated in the Americas
EIN 522125276 · Headquarters: Washington, DC, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Onipa-abusia Dc
EIN 521752931 · Headquarters: Washington, DC, US · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Online Learning Initiative
EIN 474905760 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Online News Association
EIN 510389878 · Headquarters: WASHINGTON, DC, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990
- Only Believe
EIN 333575495 · Headquarters: Washington, DC, US · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Only the Foundation
EIN 872551728 · Headquarters: WASHINGTON, DC, US · Community Improvement & Capacity Building · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- Onterra
EIN 994865886 · Headquarters: Washington, DC, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Ontological Design Community
EIN 020704316 · Headquarters: Washington, DC, US · Mental Health & Crisis Intervention · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Onward Ops Foundation
EIN 923240621 · Headquarters: WASHINGTON, DC, US · Human Services · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- Onyx Mental Health Family
EIN 991532099 · Headquarters: Washington, DC, US · Human Services · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- Oo Project
EIN 843451269 · Headquarters: WASHINGTON, DC, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Opa 90 Forum Inc
EIN 862792731 · Headquarters: Washington, DC, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Opah
EIN 995096753 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Opalack Foundation
EIN 223888369 · Headquarters: WASHINGTON, DC, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF
- Open Arms Housing Inc
EIN 522040518 · Headquarters: Washington, DC, USA · Human Services · Latest available filing year: 2023 · Primary form: IRS Form 990
- Open Book Foundation
EIN 461678633 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Open Campus Media Inc
EIN 842427054 · Headquarters: WASHINGTON, DC, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Circle Np
EIN 882940467 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Open City Advocates
EIN 202325866 · Headquarters: WASHINGTON, DC, USA · Crime & Legal Related · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Contracting Partnership
EIN 853115306 · Headquarters: Washington, DC, USA · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990
- Open Data Watch Inc
EIN 463036686 · Headquarters: WASHINGTON, DC, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Door Sports Inc
EIN 813324878 · Headquarters: Washington, DC, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Drc
EIN 842993002 · Headquarters: WASHINGTON, DC, US · Public & Societal Benefit · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- Open Education Association
EIN 332976875 · Headquarters: Washington, DC, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990
- Open Goal Project
EIN 810689175 · Headquarters: WASHINGTON, DC, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Government Partnership Secretariat
EIN 811867464 · Headquarters: WASHINGTON, DC, USA · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Hands by Serome
EIN 393804341 · Headquarters: WASHINGTON, DC, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Open Hearth Foundation Inc
EIN 541987374 · Headquarters: Washington, DC, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2012 · Primary form: IRS Form 990-N
- Open Imagery Network Inc
EIN 813160991 · Headquarters: WASHINGTON, DC, USA · Science & Technology · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Institute Internatonal Inc
EIN 371907881 · Headquarters: WASHINGTON, DC, USA · International, Foreign Affairs & National Security · Latest available filing year: 2025 · Primary form: IRS Form 990
- Open Internet Coalition Inc C/o M Erickson Steptoe & Johnson Llp
EIN 371544276 · Headquarters: WASHINGTON, DC, USA · Community Improvement & Capacity Building · Latest available filing year: 2013 · Primary form: IRS Form 990-EZ
- Open Law Library
EIN 474796144 · Headquarters: Washington, DC, United States · Education · Latest available filing year: 2025 · Primary form: IRS Form 990
- Open Markets Institute
EIN 822529375 · Headquarters: WASHINGTON, DC, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Rss
EIN 923793479 · Headquarters: Washington, DC, US · Arts, Culture & Humanities · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- Open Security Exchange
EIN 260443724 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-N
- Open Street Map US Inc
EIN 272375394 · Headquarters: Washington, DC, USA · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990
- Open Technology Fund
EIN 843126447 · Headquarters: Washington, DC, USA · Arts, Culture & Humanities · Latest available filing year: 2023 · Primary form: IRS Form 990
- OpenAQ Inc
EIN 475324172 · Headquarters: Washington, DC, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- Openminds Inc
EIN 834162171 · Headquarters: Washington, DC, US · International, Foreign Affairs & National Security · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Opensecrets
EIN 521275227 · Headquarters: Washington, DC, USA · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990
- Openvega Foundation
EIN 392823408 · Headquarters: Washington, DC, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Openwise Foundation Inc
EIN 474202083 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Opera Camerata of Washington Inc
EIN 521869819 · Headquarters: WASHINGTON, DC, USA · Arts, Culture & Humanities · Latest available filing year: 2021 · Primary form: IRS Form 990-EZ
- Opera Lafayette
EIN 522001426 · Headquarters: Washington, DC, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990
- Operating Engineers National Charity Fund
EIN 260272760 · Headquarters: WASHINGTON, DC, USA · Employment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Operation Help the People
EIN 812789950 · Headquarters: Washington, DC, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2018 · Primary form: IRS Form 990-N
- Operation Lifesaver Inc
EIN 742459189 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Operation Little Angel 101Hope After Loss Assn
EIN 861628543 · Headquarters: WASHINGTON, DC, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Operation Mali Inc
EIN 800689846 · Headquarters: Washington, DC, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Operation Mcp Inc
EIN 473346854 · Headquarters: Washington, DC, US · Human Services · Latest available filing year: 2020 · Primary form: IRS Form 990-N
- Operation Pathways Inc
EIN 472897977 · Headquarters: WASHINGTON, DC, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990
- Operation Save Africa Inc
EIN 814704354 · Headquarters: WASHINGTON, DC, US · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Operation Stand Walk Run
EIN 850602521 · Headquarters: WASHINGTON, DC, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Operation Understanding of the District of Columbia
EIN 521822488 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Operational Technology Cybersecurity Coalition Inc
EIN 884189934 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Operative Plasterers & Cement Masons' Local 891
EIN 530182220 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- Opportunities for Deserving Children
EIN 872165024 · Headquarters: Washington, DC, USA · Youth Development · Latest available filing year: 2024 · Primary form: IRS Form 990
- Opportunities Industrialization Center Washington DC
EIN 522237798 · Headquarters: Washington, DC, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2023 · Primary form: IRS Form 990
- Opportunities Industrialization Centers International Inc
EIN 231726113 · Headquarters: Washington, DC, USA · International, Foreign Affairs & National Security · Latest available filing year: 2016 · Primary form: IRS Form 990
- Opportunities to Overcome
EIN 853715866 · Headquarters: WASHINGTON, DC, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Opportunity America
EIN 464335303 · Headquarters: Washington, DC, USA · Community Improvement & Capacity Building · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- Opportunity America Educational Fund
EIN 471858873 · Headquarters: WASHINGTON, DC, USA · Human Services · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ
- Opportunity Dc
EIN 853248597 · Headquarters: WASHINGTON, DC, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990
- Opportunity for All Action Fund
EIN 872367015 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ
- Opportunity Forward Alliance
EIN 413108395 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Opportunitywork Inc
EIN 813214432 · Headquarters: WASHINGTON, DC, USA · Employment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Optica
EIN 530259696 · Headquarters: Washington, DC, United States · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2024 · Primary form: IRS Form 990
- Optimum Health Foundation
EIN 800207588 · Headquarters: washington, DC, US · Health Care · Latest available filing year: 2011 · Primary form: IRS Form 990-N
- Options Public Charter School
EIN 521993376 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- Or Chadash Bbg
EIN 272033278 · Headquarters: WASHINGTON, DC, US · Education · Latest available filing year: 2011 · Primary form: IRS Form 990-N
- ORACLE Religious Association
EIN 521798301 · Headquarters: Washington, DC, USA · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990
- Orbis Associates
EIN 521278563 · Headquarters: Washington, DC, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Orbmedia Inc
EIN 453806445 · Headquarters: WASHINGTON, DC, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Orchestra of the Americas Group Inc
EIN 522309214 · Headquarters: Washington, DC, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990
- Orde of Ahepa
EIN 237565977 · Headquarters: Washington, DC, US · Housing & Shelter · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Agepa
EIN 453844616 · Headquarters: Washington, DC, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Ahapa
EIN 272503821 · Headquarters: Washington, DC, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Ahapa
EIN 272766848 · Headquarters: Washington, DC, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Aheapa
EIN 330547641 · Headquarters: Washington, DC, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Ahepa
EIN 020426566 · Headquarters: Washington, DC, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Ahepa
EIN 061356871 · Headquarters: Washington, DC, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Ahepa
EIN 116029269 · Headquarters: Washington, DC, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Ahepa
EIN 200072711 · Headquarters: Washington, DC, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Ahepa
EIN 200192986 · Headquarters: Washington, DC, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Ahepa
EIN 200446682 · Headquarters: Washington, DC, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Ahepa
EIN 200448956 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Ahepa
EIN 200493457 · Headquarters: Washington, DC, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Ahepa
EIN 200811187 · Headquarters: Washington, DC, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Ahepa
EIN 200871581 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Order of Ahepa
EIN 201048424 · Headquarters: Washington, DC, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Ahepa
EIN 203342383 · Headquarters: Washington, DC, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Ahepa
EIN 205816104 · Headquarters: Washington, DC, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Ahepa
EIN 205957972 · Headquarters: Washington, DC, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Ahepa
EIN 208488932 · Headquarters: Washington, DC, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Ahepa
EIN 208495144 · Headquarters: Washington, DC, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Ahepa
EIN 223404762 · Headquarters: Washington, DC, US · Mutual & Membership Benefit · Latest available filing year: 2013 · Primary form: IRS Form 990-N
- Order of Ahepa
EIN 223438810 · Headquarters: Washington, DC, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Order of Ahepa
EIN 232579400 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N