When is largemouth bass season in Wisconsin?

Northern zone: harvest 3rd Sat in June – 1st Sun in March. Southern zone: open year-round. Those are the 2026 Wisconsin dates; always confirm against Wisconsin Department of Natural Resources before a trip, because an emergency order can shift an opener with little notice.

What is the Wisconsin bag limit for largemouth bass?

The Wisconsin daily bag limit for largemouth bass is 5 / day (largemouth + smallmouth combined). The possession limit is 5 in possession. Some named waters set a different limit — check the water-body overrides above.

What size largemouth bass can you keep in Wisconsin?

The Wisconsin size rule for largemouth bass is 14 in minimum statewide.

Do you need a license to fish for largemouth bass in Wisconsin?

Yes. Wisconsin requires a valid fishing license to fish for largemouth bass, with the usual exemptions for young children, state free-fishing days, and some senior or disabled-veteran categories. A license is valid only in the state that issued it, so non-residents need a Wisconsin license — compare resident and non-resident Wisconsin fees on the state regulations page below.

Are there gear restrictions for largemouth bass in Wisconsin?

Yes. In Wisconsin, largemouth bass fishing carries these gear rules: Hook-and-line on most waters; Catch-and-release window in Northern zone: no harvest 1st Sat in May – 3rd Fri in June.

Do specific Wisconsin waters have different largemouth bass rules?

Yes. 4 named Wisconsin waters carry rules that override the statewide largemouth bass regulation, including Lake Geneva, Lake Mendota, Petenwell Flowage, and 1 more. See the named water-body overrides above for the exact rule on each.

2026 regulation year

Wisconsin Largemouth bass 2026 — Season, Bag Limit, Size Rules

Micropterus nigricans

Last updated May 20, 2026

Largemouth bass are open year-round in the Southern zone and follow the standard Northern bass season elsewhere. The 5-fish bag pools largemouth with smallmouth.

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Season

Northern zone: harvest 3rd Sat in June – 1st Sun in March. Southern zone: open year-round.

Jun 20 – Mar 1Northern zone harvest

Bag & possession

Daily bag: 5 / day (largemouth + smallmouth combined)
Possession: 5 in possession

Size, slot, trophy rules

Size: 14 in minimum statewide

Gear restrictions

Hook-and-line on most waters
Catch-and-release window in Northern zone: no harvest 1st Sat in May – 3rd Fri in June

Named water-body overrides

Where statewide rules differ on specific Wisconsin waters:

Lake Geneva
Southern zone year-round bass; deep clear-water fishery
Lake Mendota
Southern zone year-round; Madison-area metro fishery
Petenwell Flowage
Wisconsin River impoundment; statewide rule
Castle Rock Lake
Wisconsin River impoundment; statewide rule

Official source

Wisconsin Department of Natural Resources publishes the authoritative 2026 Wisconsinfishing regulations. Always verify the current rule before fishing — emergency closures and in-season changes can override what's published here.

Visit official Wisconsin fishing regulations →

Emergency-order channel

Largemouth bass closures, slot-limit changes, and harvest pauses are posted to Wisconsin Department of Natural Resources's emergency-order feed — check it before any Wisconsin trip during the active season.

Frequently asked questions

When is largemouth bass season in Wisconsin?: Northern zone: harvest 3rd Sat in June – 1st Sun in March. Southern zone: open year-round. Those are the 2026 Wisconsin dates; always confirm against Wisconsin Department of Natural Resources before a trip, because an emergency order can shift an opener with little notice.
What is the Wisconsin bag limit for largemouth bass?: The Wisconsin daily bag limit for largemouth bass is 5 / day (largemouth + smallmouth combined). The possession limit is 5 in possession. Some named waters set a different limit — check the water-body overrides above.
What size largemouth bass can you keep in Wisconsin?: The Wisconsin size rule for largemouth bass is 14 in minimum statewide.
Do you need a license to fish for largemouth bass in Wisconsin?: Yes. Wisconsin requires a valid fishing license to fish for largemouth bass, with the usual exemptions for young children, state free-fishing days, and some senior or disabled-veteran categories. A license is valid only in the state that issued it, so non-residents need a Wisconsin license — compare resident and non-resident Wisconsin fees on the state regulations page below.
Are there gear restrictions for largemouth bass in Wisconsin?: Yes. In Wisconsin, largemouth bass fishing carries these gear rules: Hook-and-line on most waters; Catch-and-release window in Northern zone: no harvest 1st Sat in May – 3rd Fri in June.
Do specific Wisconsin waters have different largemouth bass rules?: Yes. 4 named Wisconsin waters carry rules that override the statewide largemouth bass regulation, including Lake Geneva, Lake Mendota, Petenwell Flowage, and 1 more. See the named water-body overrides above for the exact rule on each.

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