Lake KoshkonongFishing
Lake Koshkonong fishing & fish stocking
Fish stocking records and fishing regulations for Lake Koshkonong in Wisconsin. See the latest stockings below — which species were added, how many, and when — plus size and creel limits and where to get your Wisconsin fishing license.
Regulations
Wisconsin DNR
Bass, walleye, and northern pike are open ALL YEAR on Lake Koshkonong (no closed harvest window, unlike the statewide May 2 - Mar 7 default); muskellunge still closes Dec 31 on open water; panfish open all year. Verified live 2026-07-09 via WI DNR's per-lake regulation lookup — reconfirm dates each season.
| Species | Min. length | Daily creel | Notes |
|---|---|---|---|
| Largemouth/smallmouth bass | 14" | 5 | Open all year on this lake |
| Walleye/sauger/hybrids | 18" | 3 | Open all year on this lake |
| Muskellunge | 40" | 1 | Open-water season May 2 - Dec 31 |
| Northern pike | 26" | 2 | Open all year on this lake |
| Panfish | — | 25 | — |
Get your fishing license
Buy or renew a license for Lake Koshkonong through the state portal.