The Wisconsin Purple Martin Association helps to maintain public colonies at the following sites:
- Plymouth Intergenerational Center, Plymouth
- Harrington Beach State Park, Belgium
- Pike Lake State Park, Hartford
- Ellwood H. May Environmental Park (Maywood), Sheboygan
- Sheboygan Broughton Marsh Park, Sheboygan County
- Pine Haven
- Kohler Terry Andrae
- High Cliff State Park: Marina colony is N7630 State Park Rd, Sherwood, 54169 and at the State Park Office is N7559 Lower Cliff Road, Sherwood, WI 54169.
- City Park, Oconto
- Lutz Park, 1320 S Lutz Dr, Appleton, WI 54914, currently managed by City of Appleton & Dick Nikolai. Has one house established (pre-1980) and second house near boat landing placed spring 2018.
- Cumberland City Hall at 950 1st Avenue, Cumberland, WI 54820 currently managed by Toni Bernhardt
- The Horicon National Wildlife Refuge
- Western Great Lakes B&B Observatory
