Home Organizations Wisconsin Every cause Civil rights and advocacy 160 Environment and climate 890 Labor unions and worker centers 755 Housing and homelessness 481 Immigrant services and rights 38 Food banks and hunger 256 Legal aid 42 Voting and civic participation 54 Community health and reproductive care 58 LGBTQ+ services and rights 25 Criminal justice reform and reentry 40 Civil rights and advocacy (160) Organization City Type Revenue Organizing Empowerment Project IncEIN 84-2852380 · filings Mcfarland Advocacy, 501(c)(4) $15.2 million A Better Wisconsin Together IncEIN 84-3646174 · filings Madison Advocacy, 501(c)(4) $10.3 million Wisconsin Principles IncEIN 99-2011538 · filings Oconomowoc Advocacy, 501(c)(4) $2.8 million Wisconsin Opportunity Coalition IncEIN 82-4943049 · filings Fitchburg Advocacy, 501(c)(4) $2.5 million American Civil Liberties Union Of Wisconsin Foundation IncEIN 23-7052345 · filings Milwaukee Charity, 501(c)(3) $2.1 million Outreach IncEIN 39-1336583 · filings Madison Charity, 501(c)(3) $1.6 million Milwaukee Pride IncEIN 38-3901627 · filings Milwaukee Charity, 501(c)(3) $1.5 million Integrity MinnesotaEIN 86-2562385 · filings Hudson Advocacy, 501(c)(4) $1.4 million Freedom Action Now IncEIN 84-3944949 · filings Madison Advocacy, 501(c)(4) $1.3 million League Of Women Voters Of Wisconsin IncEIN 39-1609121 · filings Madison Charity, 501(c)(3) $1.2 million Voces De La Frontera Action IncEIN 02-0759160 · filings Milwaukee Advocacy, 501(c)(4) $1.0 million Wels Lutherans For Life Metro Milwaukee IncEIN 39-1436085 · filings West Allis Charity, 501(c)(3) $984,657
The 160 largest →
Environment and climate (890) Organization City Type Revenue Slipstream Group IncEIN 39-1356152 · filings Madison Charity, 501(c)(3) $41.1 million Revolvs Salvage IncEIN 33-1505508 · filings Waupaca Charity, 501(c)(3) $25.2 million Whitetails Unlimited IncEIN 39-1415070 · filings Sturgeon Bay Charity, 501(c)(3) $14.3 million Landmark Conservancy IncEIN 39-1872550 · filings Menomonie Charity, 501(c)(3) $12.2 million Urban Ecology Center IncEIN 39-1712663 · filings Milwaukee Charity, 501(c)(3) $8.4 million Kohler Tr For Clean WaterEIN 32-6513655 · filings Kohler Charity, 501(c)(3) $7.5 million Northwoods Land Trust IncEIN 31-1776860 · filings Eagle River Charity, 501(c)(3) $6.0 million Door County Land Trust IncEIN 39-1561423 · filings Sturgeon Bay Charity, 501(c)(3) $5.7 million Restoring Lands IncEIN 39-1741288 · filings West Bend Charity, 501(c)(3) $5.1 million Driftless Area Land Conservancy IncEIN 39-2017802 · filings Dodgeville Charity, 501(c)(3) $5.1 million Clean Wisconsin IncEIN 39-1413448 · filings Madison Charity, 501(c)(3) $5.0 million Friends Of Schlitz-audubon Center IncEIN 39-1231819 · filings Milwaukee Charity, 501(c)(3) $4.6 million
The 300 largest →
Labor unions and worker centers (755) Organization City Type Revenue International Union Of Operating Engineers 139EIN 39-0368025 · filings Pewaukee Labor organization, 501(c)(5) $20.9 million International Association Of Sheet Metal Air Rail & TransportationEIN 39-1419063 · filings Waukesha Labor organization, 501(c)(5) $11.6 million United Association Of Journeymen & Apprentices Plumbers & PipefittersEIN 39-1915458 · filings Kaukauna Labor organization, 501(c)(5) $10.3 million International Brotherhood Of Electrical WorkersEIN 39-0260870 · filings Milwaukee Labor organization, 501(c)(5) $6.8 million International Brotherhood Of Electrical WorkersEIN 39-1031359 · filings Menomonee Fls Labor organization, 501(c)(5) $6.2 million International Brotherhood Of Electrical WorkersEIN 39-0855434 · filings Racine Labor organization, 501(c)(5) $5.9 million International Union Of Painters And Allied TradesEIN 32-0081499 · filings Big Bend Labor organization, 501(c)(5) $5.7 million Bridge Structural And Ornamental Iron Workers Local-8EIN 39-0182085 · filings Milwaukee Labor organization, 501(c)(5) $5.7 million Wisconsin Farm Bureau Federation CooperativeEIN 39-0808613 · filings Madison Labor organization, 501(c)(5) $5.6 million International Union Of Bricklayers And Allied CraftworkersEIN 39-1590426 · filings New Berlin Labor organization, 501(c)(5) $5.4 million United Food And Commercial Workers International UnionEIN 56-2585698 · filings Greendale Labor organization, 501(c)(5) $5.2 million International Brotherhood Of TeamstersEIN 39-0146203 · filings Milwaukee Labor organization, 501(c)(5) $5.1 million
The 300 largest →
Housing and homelessness (481) Organization City Type Revenue Wisconsin Housing Preservation CorpEIN 30-0002040 · filings Madison Charity, 501(c)(3) $85.3 million Chiara Housing And Services IncEIN 83-2128180 · filings Waukesha Charity, 501(c)(3) $55.6 million Illuminus Retirement Communities IncEIN 61-1517711 · filings Watertown Charity, 501(c)(3) $53.9 million Chiara Communities IncEIN 72-1525725 · filings Waukesha Charity, 501(c)(3) $40.8 million Travaux IncEIN 46-2796790 · filings Milwaukee Charity, 501(c)(3) $38.4 million Future Wisconsin Housing Fund IncEIN 39-1897032 · filings Middleton Charity, 501(c)(3) $30.9 million Oakwood Village Prairie Ridge Homes IncEIN 39-1966791 · filings Madison Charity, 501(c)(3) $23.1 million Milwaukee Habitat For HumanityEIN 39-1496741 · filings Milwaukee Charity, 501(c)(3) $22.7 million Energy Services IncEIN 39-1443614 · filings Fitchburg Charity, 501(c)(3) $22.7 million Harwood Place IncEIN 39-1531532 · filings Wauwatosa Charity, 501(c)(3) $14.8 million Partners For Community Development IncEIN 39-1216413 · filings Sheboygan Charity, 501(c)(3) $14.1 million Habitat For Humanity International IncEIN 39-1742974 · filings Menasha Charity, 501(c)(3) $13.5 million
The 300 largest →
Immigrant services and rights (38) Organization City Type Revenue United Community Center IncEIN 39-1146191 · filings Milwaukee Charity, 501(c)(3) $53.3 million Centro Hispano IncEIN 93-0844812 · filings Madison Charity, 501(c)(3) $6.6 million International Institute Of Wisconsin IncEIN 39-0806350 · filings Milwaukee Charity, 501(c)(3) $4.9 million Voces De La Frontera IncEIN 39-2010107 · filings Milwaukee Charity, 501(c)(3) $3.8 million Hanan Refugees Relief GroupEIN 82-1762609 · filings Milwaukee Charity, 501(c)(3) $2.5 million Italian Community Center IncEIN 39-1304069 · filings Milwaukee Charity, 501(c)(3) $947,010 Community Services Agency IncEIN 82-0864722 · filings Green Bay Charity, 501(c)(3) $551,206 Casa Guadalupe Education Center IncEIN 20-4483105 · filings West Bend Charity, 501(c)(3) $460,651 Hmoob Cultural And Community Agency IncEIN 93-0835587 · filings La Crosse Charity, 501(c)(3) $436,903 Milwaukee Chinese Community CenterincEIN 20-5575651 · filings Brookfield Charity, 501(c)(3) $332,941 Southeast Asian Healing Center IncorporatedEIN 83-2393889 · filings Madison Charity, 501(c)(3) $323,383 Friends Of International Institute Of Milwaukee County IncEIN 23-7074729 · filings Milwaukee Charity, 501(c)(3) $293,571
The 38 largest →
Food banks and hunger (256) Organization City Type Revenue Feeding America Eastern Wisconsin IncEIN 39-1384593 · filings Milwaukee Charity, 501(c)(3) $92.9 million Second Harvest Foodbank Of Southern WisconsinEIN 39-1490691 · filings Madison Charity, 501(c)(3) $59.3 million Just One More Ministry IncEIN 46-1176899 · filings Glendale Charity, 501(c)(3) $18.1 million Pauls Pantry IncEIN 39-1708806 · filings Green Bay Charity, 501(c)(3) $13.4 million St Croix Valley Foodbank IncEIN 85-2550542 · filings Hudson Charity, 501(c)(3) $9.0 million Oshkosh Area Community Pantry IncEIN 26-3714702 · filings Oshkosh Charity, 501(c)(3) $7.2 million Badger Prairie Needs Network IncEIN 45-1159288 · filings Verona Charity, 501(c)(3) $6.9 million Beyond Blessed PantryEIN 83-1491544 · filings Wisc Dells Charity, 501(c)(3) $5.8 million Sheboygan County Food Bank IncEIN 39-1733883 · filings Sheboygan Charity, 501(c)(3) $4.7 million Se Wi Emergency Support Group IncEIN 85-1044086 · filings Waukesha Charity, 501(c)(3) $3.2 million Nourishmke IncEIN 39-1587037 · filings Milwaukee Charity, 501(c)(3) $2.9 million Family Sharing Of Ozaukee Co IncEIN 39-1476384 · filings Grafton Charity, 501(c)(3) $2.8 million
The 256 largest →
Legal aid (42) Organization City Type Revenue Legal Action Of Wisconsin IncEIN 39-1077192 · filings Milwaukee Charity, 501(c)(3) $17.1 million Wisconsin Trust Account FoundationEIN 39-1555465 · filings Madison Charity, 501(c)(3) $12.8 million Federal Defender Services Of Wisconsin IncEIN 39-1988256 · filings Milwaukee Charity, 501(c)(3) $6.2 million Wisconsin Institute For Law & Liberty IncEIN 45-1606079 · filings Milwaukee Charity, 501(c)(3) $6.1 million Legal Aid Society Of MilwaukeeEIN 39-0806284 · filings Milwaukee Charity, 501(c)(3) $5.8 million Wisconsin Judicare IncorporatedEIN 39-1170880 · filings Wausau Charity, 501(c)(3) $4.2 million Law Forward IncEIN 84-2803392 · filings Madison Charity, 501(c)(3) $3.0 million Central Wisconsin Community Law IncEIN 85-2790200 · filings Milwaukee Charity, 501(c)(3) $1.3 million Midwest Environmental Advocates IncEIN 39-2006475 · filings Madison Charity, 501(c)(3) $1.2 million Milwaukee Bar Association Foundation IncEIN 39-6040219 · filings Milwaukee Charity, 501(c)(3) $920,512 Lotus Legal Clinic IncEIN 47-5156371 · filings Brookfield Charity, 501(c)(3) $782,298 Economic Justice Institute IncEIN 39-1200952 · filings Madison Charity, 501(c)(3) $732,701
The 42 largest →
Voting and civic participation (54) Organization City Type Revenue Organizing Empowerment Project IncEIN 84-2852380 · filings Mcfarland Advocacy, 501(c)(4) $15.2 million League Of Women Voters Of Wisconsin IncEIN 39-1609121 · filings Madison Charity, 501(c)(3) $1.2 million Voces De La Frontera Action IncEIN 02-0759160 · filings Milwaukee Advocacy, 501(c)(4) $1.0 million Grassroots Organizing Western Wisconsin IncEIN 92-3691508 · filings River Falls Advocacy, 501(c)(4) $817,751 Election Watch IncEIN 92-0863109 · filings New London Charity, 501(c)(3) $730,604 Wisdom Action Network IncEIN 82-4196797 · filings Milwaukee Advocacy, 501(c)(4) $557,830 Madison Parks Foundation IncEIN 33-1047992 · filings Madison Charity, 501(c)(3) $525,544 Wisconsin Family Action IncEIN 83-0448717 · filings Madison Advocacy, 501(c)(4) $502,418 League Of Women Voters Of Dane County IncEIN 39-0892881 · filings Madison Charity, 501(c)(3) $210,761 Our Wisconsin Revolution IncEIN 81-4853693 · filings Madison Advocacy, 501(c)(4) $207,464 League Of Women Voters IncEIN 39-6096750 · filings Milwaukee Charity, 501(c)(3) $193,202 Autonomous Solidarity Organization IncEIN 45-1765682 · filings Madison Charity, 501(c)(3) $121,254
The 54 largest →
Community health and reproductive care (58) Organization City Type Revenue Aspirus Medical Group IncEIN 39-1670223 · filings Wausau Charity, 501(c)(3) $137.9 million Grant Regional Health Center IncEIN 39-1834962 · filings Lancaster Charity, 501(c)(3) $58.4 million Madison Surgery Center IncEIN 39-1940656 · filings Middleton Charity, 501(c)(3) $38.6 million Planned Parenthood Of Wisconsn IncEIN 39-0863391 · filings Milwaukee Charity, 501(c)(3) $35.8 million Milwaukee Health Services IncEIN 39-1664109 · filings Milwaukee Charity, 501(c)(3) $25.0 million Mosaic Family Health IncEIN 47-3298660 · filings Appleton Charity, 501(c)(3) $16.4 million Scenic Bluffs Health Center IncEIN 39-1760445 · filings Cashton Charity, 501(c)(3) $12.9 million Generations Fertility Care IncEIN 27-3496527 · filings Middleton Charity, 501(c)(3) $10.7 million Primary Connection Health Care IncEIN 39-1759404 · filings Wausau Charity, 501(c)(3) $6.6 million Healthfirst Network IncEIN 39-1206364 · filings Wausau Charity, 501(c)(3) $6.1 million Open Arms Free Clinic IncEIN 45-4475625 · filings Elkhorn Charity, 501(c)(3) $3.8 million Bread Of Healing IncEIN 81-0669867 · filings Milwaukee Charity, 501(c)(3) $2.2 million
The 58 largest →
LGBTQ+ services and rights (25) Organization City Type Revenue Outreach IncEIN 39-1336583 · filings Madison Charity, 501(c)(3) $1.6 million Fair Wisconsin Education Fund IncEIN 02-0559730 · filings Madison Charity, 501(c)(3) $450,798 Lesbian Gay Bisexual Trangender Comm Centr Of The Chippewa ValleyEIN 39-2018270 · filings Eau Claire Charity, 501(c)(3) $106,303 Open-out Professional And Executive Network- IncEIN 27-1876988 · filings Madison Advocacy, 501(c)(4) — G L Community Fund IncEIN 39-1902944 · filings Milwaukee Charity, 501(c)(3) — Fangevents IncEIN 39-2277106 · filings Madison Charity, 501(c)(3) — Peoples CenterEIN 39-2311949 · filings Appleton Charity, 501(c)(3) — Northeast Wisconsin Rainbow Collective IncEIN 39-3542170 · filings Oshkosh Charity, 501(c)(3) — Point Of Pride Portage County IncEIN 39-4153487 · filings Stevens Point Charity, 501(c)(3) — Safety Group Green Lake IncEIN 39-4545425 · filings Berlin Charity, 501(c)(3) — The Queer Collaborative IncEIN 41-5092660 · filings Eau Claire Charity, 501(c)(3) — Mad City Sisters IncEIN 46-0864229 · filings Madison Charity, 501(c)(3) —
The 25 largest →
Criminal justice reform and reentry (40) Organization City Type Revenue Wisconsin Community Services IncEIN 39-0808464 · filings Milwaukee Charity, 501(c)(3) $54.6 million Justicepoint IncEIN 45-3611369 · filings Milwaukee Charity, 501(c)(3) $17.3 million Attic Correctional Services IncEIN 39-1371291 · filings Madison Charity, 501(c)(3) $13.7 million Briarpatch Youth Services IncEIN 39-1391737 · filings Fitchburg Charity, 501(c)(3) $4.2 million Expo Of Wisconsin IncEIN 84-3807756 · filings Madison Charity, 501(c)(3) $878,750 My Way Out IncEIN 87-1385421 · filings Milwaukee Charity, 501(c)(3) $838,005 Life After Hate IncEIN 45-3039640 · filings Brookfield Charity, 501(c)(3) $459,900 Dane Dances IncEIN 75-3118218 · filings Madison Charity, 501(c)(3) $98,378 Smile IncEIN 81-2582639 · filings Milwaukee Charity, 501(c)(3) $85,958 Ozaukee County Jail Literacy Program IncEIN 36-4174521 · filings Grafton Charity, 501(c)(3) $74,440 Green Bay NeighborhoodsEIN 01-0910176 · filings Green Bay Charity, 501(c)(3) $71,628 Jail Chaplaincy Of Kenosha County IncEIN 39-1675373 · filings Kenosha Charity, 501(c)(3) $42,239
The 40 largest →
Matched by IRS activity code and listed by the revenue on the organization's latest return. Inclusion is not an endorsement; check an organization's own site and filings before you give. Gifts to 501(c)(4) and 501(c)(5) organizations are not tax-deductible.
Source: IRS Exempt Organizations Business Master File . Updated Nov 9, 2026.