| The Charles and Kathryn Heide Schoolyard Observatory at Hawthorn Hollow | |
| Observatory | The Charles and Kathryn Heide Schoolyard Observatory |
| Meetings | Open Year-Round |
| Location | 880 Green Bay Road Kenosha, WI 53140 262-552-8196 |
| Milwaukee Astronomical Society | |
| Observatory | MAS Observatory |
| Meetings | 3rd Friday of every month, 8:00 p.m. |
| Location | All meetings are at the MAS Observatory 18850 Observatory Road New Berlin, WI 262-542-9071 |
| Northern Cross Science Foundation | |
| Observatory | Jim & Gwen Plunkett Observatory at Harrington Beach State Park |
| Meetings | 1st Thursday of every month, 7:30pm |
| Location | Unitarian Church North 13800 N. Port Washington Rd. Mequon, WI 53097 |
| Pewaukee Astronomy Club | |
| Observatory | Harken Observatory at the Pewaukee Public Library |
| Meetings | Tuesday before the second Saturday of every month, 7:00 p.m. |
| Location | Pewaukee Public Library 210 Main Street Pewaukee, WI 53072 |
| Racine Astronomical Society | |
| Observatory | Modine-Benstead Observatory |
| Meetings | Third Saturday of January, April, July, and October, 7:30 p.m. |
| Location | All meetings are at the Modine-Benstead Observatory 112 63rd Drive Union Grove, WI 53182 262-878-2774 |
| Urban Stargazers | |
| Meetings | 2nd Thursday of every month, 7:00 p.m. |
| Location | Urban Ecology Center Riverside Park 1500 East Park Place Milwaukee, WI 53211 414-964-8505 |
| Wehr Astronomical Society | |
| Observatory | W.A.S. Observatory at Froemming Park |
| Meetings | 2nd Tuesday of every month, 7:00 p.m. |
| Location | Wehr Nature Center 9701 West College Ave Franklin, WI 53132 414-425-8550 |
