Nonprofits in Wisconsin
39,461 organizations in the IRS master file with a Wisconsin address, listed A to Z by name.
Public IRS records only
This list comes from the IRS master file, which anyone can download from irs.gov. Nothing on it comes from Fast File Exempt accounts or filings. We run this lookup; it isn’t an IRS service. About this data
All organizations, page 1 of 790
IRS master file dated October 13, 2026; loaded here on October 26, 2026.
0–9
- 0249 PAUL G JOHNSON INCEIN 39-6075374FREDERIC501(c)(19)
- 1-121ST FIELD ARTILLERY VETERANS ASSOCIATION INC1-121ST FIELD ARTILLERY VETERANS ASEIN 47-5316938CEDARBURG501(c)(3)
- 1-HEARTEIN 46-2097242NEENAH501(c)(3)
- 1 IN 4 MINISTRY INCEIN 42-4079461BERLIN501(c)(3)
- 10 LORDS-A-LEAPINGEIN 83-1472545WEST BEND501(c)(3)
- 100 BLACK MEN OF MADISON INCEIN 39-1803848MADISON501(c)(3)
- 100 BLACK MEN OF MILWAUKEE INCEIN 39-1734030MILWAUKEE501(c)(3)
- 100 MEN OF DANE COUNTY INCEIN 46-0881065MADISON501(c)(3)
- 100 PLUS WOMEN WHO CARE NORTHERN DOOR COUNTY INCEIN 84-2307610EGG HARBOR501(c)(3)
- 100 WOMEN WHO CARE MADISONEIN 81-3786131MADISON501(c)(3)
- 1000 FRIENDS OF WISCONSIN INCEIN 39-1857262STEVENS POINT501(c)(3)
- 1000 GENERATIONS INCEIN 47-2646525ELKHORN501(c)(3)
- 100STATE INCEIN 46-3122144MADISON501(c)(3)
- 101055 STOUGHTON AREA LLEIN 39-2017205STOUGHTON501(c)(3)
- 115 CLUB LTDEIN 39-1635163KEWAUNEE501(c)(3)
- 11TH HOUSE PUBLISHING COMPANYEIN 33-1608860PRT WASHINGTN501(c)(3)
- 11TH MAN CLUB INCEIN 99-5120995NEW BERLIN501(c)(3)
- 12 & 12 DROP IN CENTER INCEIN 39-1590023JANESVILLE501(c)(3)
- 127TH INFANTRY VETERANS ASSOCIATIONEIN 83-4311025APPLETON501(c)(19)
- 128TH AIR REFUELING WING COMMUNITY COUNCILEIN 39-2012347WAUWATOSA501(c)(3)
- 128TH CIVIC DINNER DANCE INCEIN 83-1369505MILWAUKEE501(c)(3)
- 14 FOUNDATION - FRIENDS OF STEVE ARNOVICH CHARITY FOUNDATION14 FOUNDATIONEIN 26-2882372SUPERIOR501(c)(3)
- 14 MILE WATERSHED ALLIANCE - CORPORATION14 MILE WATERSHED ALLIANCEEIN 86-1497972NEKOOSA501(c)(3)
- 14 SOUTH ARTISTSEIN 42-1647472OREGON501(c)(4)
- 14TH APOSTLE INCEIN 39-1452288DELAVAN501(c)(3)
- 15 TO THA STREETSEIN 99-2863819MILWAUKEE501(c)(3)
- 1501059 WEST BEND WI LIGHTHOUSE AGLOW INTERNATIONAL1501059 WEST BEND WI COMMUNITY LIGHEIN 93-1041089WEST BEND501(c)(3)
- 151 ADVENTURE INCEIN 92-3233953SUN PRAIRIE501(c)(3)
- 16 DAYS INCEIN 99-3062045AMHERST JCT501(c)(3)
- 17 OAKS THERAPY INCEIN 99-0991963FRIENDSHIP501(c)(3)
- 180 ADVENTURE OUTDOORS INCEIN 42-2794714HAYWARD501(c)(3)
- 1848 PROJECT INCEIN 84-4343732PEWAUKEE501(c)(4)
- 1895 BANCORP OF WISCONSIN COMMUNITY FOUNDATION INCEIN 83-2994170GREENFIELD501(c)(3)
- 1897 CLARK COUNTY JAIL MUSEUMEIN 20-4472418NEILLSVILLE501(c)(3)
- 18WHEELSMA INCEIN 33-1511399GREENWOOD501(c)(3)
- 1907 CLUBEIN 39-6077966SHEBOYGAN501(c)(3)
- 1936 MACARTHUR INCEIN 82-3397050WAUKESHA501(c)(3)
- 1962 HOLDINGS INCEIN 33-4639362STEVENS POINT501(c)(4)
- 1974 MARINE FOOTBALL A CLASS ABOVE AN INCORPORATED CHARITYEIN 88-2052030MARINETTE501(c)(3)
- 1982 DEPT OF WISCONSIN UNITED VIETNAM VETERANS CORPORATIONEIN 39-1424278HARTFORD501(c)(19)
- 1HOPE TOGETHER INCEIN 82-5528627KENOSHA501(c)(3)
- 1ST CHRISTIAN CHURCH OF RHINELANDER CORPORATIONEIN 92-3813559RHINELANDER501(c)(3)
- 2-1-1 WISCONSIN INCEIN 20-1376669MADISON501(c)(3)
- 206 CLUB INCEIN 39-1623872MENASHA501(c)(3)
- 221B CONSOLIDATED LTDEIN 39-3023990FITCHBURG501(c)(3)
- 222 CORPS MINISTRIES INCEIN 46-4235105GRAFTON501(c)(3)
- 23 CUB SCOUT PACKEIN 39-1840278BROOKFIELD501(c)(3)
- 23S CLEATS 4 KIDZEIN 99-1796393GREEN BAY501(c)(3)
- 24 VALLEY TROUT CLUB INCORPORATEDEIN 82-2328919CASHTON501(c)(3)
- 247 NETWORKEIN 47-2837461WISC RAPIDS501(c)(3)
Guides
- Form 990-N, 990-EZ or 990: which to fileThe three tests, what "normally $50,000" means, who must file Form 990 regardless, and who doesn't file at all.
- Form 990 for PTAs, PTOs and booster clubsWhether a unit under a state group exemption files its own return, which form, the July–June deadline, and the treasurer handover.
- Private foundation filing requirementsForm 990-PF, its deadline and extension, and the separate returns a foundation may owe.
- Who can file Form 990-NThe "normally $50,000 or less" test, what the e-Postcard asks for, and when it's due.
- Form 990-N filing problemsEIN not in IRS records, IRS sign-in, filing too early, late and prior-year notices, and checking a past filing.
- Form 990 filing deadlinesThe general due date for each tax-year end, and how weekends and holidays move it.
- Form 8868 extensionsWhen Form 8868 extends an annual return, and why tax is still due on the original date.
- Late filing penaltiesThe daily penalty for a late return, reasonable cause, and the three-year revocation rule.