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
- Obatalas Children
EIN 874029371 · Headquarters: WASHINGTON, DC, USA · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Oberlin Cooperative Education Fund Inc
EIN 884398759 · Headquarters: WASHINGTON, DC, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Obinofia USA Inc
EIN 852613530 · Headquarters: Washington, DC, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Observer Research Foundation America
EIN 852694328 · Headquarters: WASHINGTON, DC, USA · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990
- Ocase Foundation Inc
EIN 455238766 · Headquarters: Washington, DC, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Ocean Ana Rising Incorporated
EIN 202179933 · Headquarters: Washington, DC, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Ocean Awareness Project Inc
EIN 141861309 · Headquarters: Washington, DC, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Ocean Carrier Equipment Management Association Inc
EIN 202563404 · Headquarters: WASHINGTON, DC, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990
- Ocean Conservancy
EIN 237245152 · Headquarters: WASHINGTON, DC, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Ocean Doctor Inc
EIN 461431787 · Headquarters: Washington, DC, US · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- Ocean Risk and Resilience Action Alliance Inc
EIN 833580499 · Headquarters: WASHINGTON, DC, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Ocean Stewards Institute
EIN 208882514 · Headquarters: Washington, DC, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Oceana
EIN 510401308 · Headquarters: Washington, DC, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Oceana Action Inc
EIN 311814181 · Headquarters: WASHINGTON, DC, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Oceangate Foundation
EIN 463977125 · Headquarters: Washington, DC, USA · Science & Technology · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ
- Ocular Melanoma Foundation
EIN 200355509 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Odd Fellows Temple Independent Order of Odd Fellows Dc
EIN 530087680 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Odi North America Inc
EIN 933388787 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Off My Block
EIN 475522600 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Off the Street Ministries Inc
EIN 474965806 · Headquarters: WASHINGTON, DC, US · Religion Related · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- Office of Management and Budget Employee Welfare Fund
EIN 521911768 · Headquarters: Washington, DC, US · Mutual & Membership Benefit · Latest available filing year: 2007 · Primary form: IRS Form 990-N
- Official Service Dogs
EIN 844517450 · Headquarters: Washington, DC, US · Mental Health & Crisis Intervention · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Official Tottenham Hotspur Supporters Club of Washington Dc
EIN 861862314 · Headquarters: Washington, DC, US · Recreation & Sports · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- Offshore Research Association Unasyest
EIN 854341934 · Headquarters: WASHINGTON, DC, US · Environment · Latest available filing year: 2020 · Primary form: IRS Form 990-N
- Offshore Wind Development Coalition Inc
EIN 273544829 · Headquarters: WASHINGTON, DC, US · Community Improvement & Capacity Building · Latest available filing year: 2010 · Primary form: IRS Form 990-N
- OGG
EIN 872545911 · Headquarters: WASHINGTON, DC, USA · Education · Latest available filing year: 2021 · Primary form: IRS Form 990-EZ
- Ogwashi-uku Association Dmv Incorporated
EIN 993097638 · Headquarters: Washington, DC, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Ogwashi-Uku Association U-S-A Inc
EIN 364478416 · Headquarters: Washington, DC, US · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Ohavim Bbg 418
EIN 272017099 · Headquarters: WASHINGTON, DC, US · Education · Latest available filing year: 2011 · Primary form: IRS Form 990-N
- Ohev Bbg
EIN 272033838 · Headquarters: WASHINGTON, DC, US · Education · Latest available filing year: 2011 · Primary form: IRS Form 990-N
- Ohio Black Civic Engagement Coalition
EIN 331280966 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Ohio Business Council Inc C/o Hannah Schmidt Alpine Group
EIN 472581851 · Headquarters: Washington, DC, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Ohio Conservative Restoration Project
EIN 871142309 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990
- Ohio Cued Speech Association
EIN 311255263 · Headquarters: Washington, DC, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2016 · Primary form: IRS Form 990-N
- Ohio Society of Washington Dc
EIN 204477796 · Headquarters: Washington, DC, US · Community Improvement & Capacity Building · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- Ohio State University Alumni Association Inc
EIN 311484803 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Ohioans for Free and Fair Elections
EIN 871141973 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990
- Oikocredit
EIN 363697513 · Headquarters: Washington, DC, USA · Religion Related · Latest available filing year: 2016 · Primary form: IRS Form 990
- Oil and Gas Educational Foundation Incorporated
EIN 521934264 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2007 · Primary form: IRS Form 990-N
- Oil and Natural Gas Industry Labor Management Committee
EIN 270567842 · Headquarters: WASHINGTON, DC, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990
- Oil Change International Inc
EIN 203272355 · Headquarters: Washington, DC, USA · Public & Societal Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990
- Oil Change USA
EIN 743181474 · Headquarters: Washington, DC, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Oil of Joy Ministries Inc
EIN 472234560 · Headquarters: Washington, DC, US · Human Services · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- Old Grand Theater Company
EIN 454323764 · Headquarters: washington, DC, US · Arts, Culture & Humanities · Latest available filing year: 2014 · Primary form: IRS Form 990-N
- Old School Boxing Athletic Center
EIN 205960251 · Headquarters: Washington, DC, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Old Soldiers Home Foundation Inc
EIN 815214355 · Headquarters: WASHINGTON, DC, USA · Housing & Shelter · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Old Umuahia Development Union North America
EIN 510402326 · Headquarters: WASHINGTON, DC, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Olive Branch Inc
EIN 522145325 · Headquarters: Washington, DC, US · Human Services · Latest available filing year: 2009 · Primary form: IRS Form 990-N
- Oliver and Harriet Sockwell Foundation
EIN 521661837 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF
- Olmsted Network Inc
EIN 133052765 · Headquarters: WASHINGTON, DC, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990
- Olympism for Humanity Alliance
EIN 473931589 · Headquarters: WASHINGTON, DC, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Omega Life Membership Foundation
EIN 222608127 · Headquarters: WASHINGTON, DC, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990
- Omega Network for Action Inc
EIN 852947719 · Headquarters: Washington, DC, US · Civil Rights, Social Action & Advocacy · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Omega Psi Phi Fraternity
EIN 461873882 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2012 · Primary form: IRS Form 990-N
- Omega Psi Phi Fraternity
EIN 526071184 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Omega Psi Phi Fraternity Inc Alpha Chapter
EIN 526057267 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-N
- Omega Theta Rho Sorority
EIN 843648496 · Headquarters: Washington, DC, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Omicron Delta Epsilon Intl Honor Society in Economics Inc
EIN 237350210 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N
- Omicron Delta Epsilon Intl Honor Society in Economics Inc
EIN 742593248 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N
- Omicron Delta Epsilon Intl Honor Society in Economics Inc
EIN 911955148 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-N
- Omicron Eta Lambda Charitable Foundation
EIN 522001949 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Omicron Omicron Charitable Foundation
EIN 853320839 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Omicron Phi Zeta
EIN 811574929 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Omna Tigray
EIN 862849940 · Headquarters: WASHINGTON, DC, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- OmniAir Certification Services
EIN 452722778 · Headquarters: Washington, DC, USA · Science & Technology · Latest available filing year: 2016 · Primary form: IRS Form 990
- OmniGov Training Institute
EIN 521659996 · Headquarters: WASHINGTON, DC, USA · Crime & Legal Related · Latest available filing year: 2020 · Primary form: IRS Form 990-EZ
- Omon Ose Foundation Inc
EIN 333845811 · Headquarters: WASHINGTON, DC, US · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- On My Way Home Ministries
EIN 850760389 · Headquarters: Washington, DC, US · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- On the Ground News Production
EIN 384065660 · Headquarters: Washington, DC, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- On-ramps to Careers Inc
EIN 464824282 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990
- Once Upon a Prom
EIN 205941674 · Headquarters: Washington, DC, US · Human Services · Latest available filing year: 2014 · Primary form: IRS Form 990-N
- ONE Action
EIN 020544768 · Headquarters: Washington, DC, USA · Civil Rights, Social Action & Advocacy · Latest available filing year: 2024 · Primary form: IRS Form 990
- One Body
EIN 821662392 · Headquarters: Washington, DC, US · Religion Related · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- One Care Dc Foundation
EIN 843173384 · Headquarters: WASHINGTON, DC, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- One Common Unity
EIN 522270569 · Headquarters: Washington, DC, USA · Arts, Culture & Humanities · Latest available filing year: 2022 · Primary form: IRS Form 990
- One Country Inc
EIN 833768552 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- One Economy Corporation
EIN 522220052 · Headquarters: WASHINGTON, DC, USA · Human Services · Latest available filing year: 2011 · Primary form: IRS Form 990
- One Garment One Child
EIN 812795120 · Headquarters: Washington, DC, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2016 · Primary form: IRS Form 990-N
- One Generation Away
EIN 272944121 · Headquarters: WASHINGTON, DC, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990
- One Gulf Foundation
EIN 814530084 · Headquarters: Washington, DC, US · Environment · Latest available filing year: 2022 · Primary form: IRS Form 990-N
- One Jerusalem Charitable & Educational F
EIN 311758639 · Headquarters: WASHINGTON, DC, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- One Love True Change
EIN 465110724 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- One Mind at a Time Foundation
EIN 811084607 · Headquarters: Washington, DC, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- One Minstries Inc
EIN 237399346 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- One Nation Health Coalition
EIN 814729054 · Headquarters: Washington, DC, US · Health Care · Latest available filing year: 2018 · Primary form: IRS Form 990-N
- One Nation One Vote
EIN 814553729 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- One Night Only Inc
EIN 452845561 · Headquarters: Washington, DC, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- One Party at a Time
EIN 853695266 · Headquarters: Washington, DC, US · Youth Development · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- One Percent Coalition
EIN 203752502 · Headquarters: Washington, DC, US · Human Services · Latest available filing year: 2008 · Primary form: IRS Form 990-N
- One Schoolhouse
EIN 270417089 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990
- One Step Closer Foundation Inc
EIN 814213227 · Headquarters: Washington, DC, US · Employment · Latest available filing year: 2020 · Primary form: IRS Form 990-N
- One Tent Health
EIN 813082227 · Headquarters: Washington, DC, USA · Health Care · Latest available filing year: 2022 · Primary form: IRS Form 990
- One Victory
EIN 471713998 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- One Village at a Time
EIN 300209724 · Headquarters: Washington, DC, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2014 · Primary form: IRS Form 990-N
- One World Education
EIN 208624702 · Headquarters: WASHINGTON, DC, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990
- One World Peace Association
EIN 853509912 · Headquarters: Washington, DC, US · International, Foreign Affairs & National Security · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- One World Youth Project Inc
EIN 471284133 · Headquarters: Washington, DC, US · Arts, Culture & Humanities · Latest available filing year: 2014 · Primary form: IRS Form 990-N
- Oneblue Inc
EIN 562580485 · Headquarters: WASHINGTON, DC, USA · Arts, Culture & Humanities · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ
- Onecity
EIN 882643054 · Headquarters: WASHINGTON, DC, US · Mental Health & Crisis Intervention · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- OneTILT Inc
EIN 821889832 · Headquarters: Washington, DC, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2023 · Primary form: IRS Form 990-N