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City reservoir

Lake Decatur

Macon County, Illinois

Lake Decatur is a City of Decatur reservoir on the Sangamon River, created in the early 1920s, with parks including Nelson Park and Faries Park along its shore. IDNR lists walleye, crappie, white bass and catfish among its fisheries.

N5 mi
Air temp in Decatur, IL Loading current temperature…
Map data © OpenStreetMap contributors.
Surface area3,093 acres
Max depth—
Shoreline—
Boat motorsCheck local rules

Species

Fishery rating out of 5.

Walleye●●●●○

Points, flats and reefs at low light. Jigs and live bait early, crankbaits and crawler harnesses in summer.

Crappie●●●●○

Brush piles, docks and standing timber. Minnows or small jigs.

White Bass●●●○○

Schools chasing shad in open water, and spring river runs.

Wiper●●○○○

Hybrid striped bass. Chase surface-feeding schools and points with wind.

Channel Catfish●●●●○

Cut bait and nightcrawlers on flats and creek mouths in the evening.

Flathead Catfish●●●○○

Live bait around wood and rock at night.

Largemouth Bass●●●○○

Weeds, docks and wood in the shallows.

Boat launches

2 launch sites. Fees and hours change, so confirm before you go.

  • Nelson Park boat rampsPublic
    City of Decatur launch; boat registration or day pass from the Lake Patrol office in Nelson Park; fees applyDirections ↗
  • More public accessPublic
    See the IDNR or lake website for all ramps and feesDirections ↗

Size & creel limits

Special rules for this lake, confirmed from official state regulations. Minimum size and daily limit.

SpeciesMin sizeDaily limit
Largemouth/Smallmouth Bass14 in6 / day
Crappie10 in10 / day

Other species in this lake: look up the limits at Illinois Department of Natural Resources ↗

Verified October 2026. Rules change, so confirm current limits with the Illinois Department of Natural Resources before you fish.

Bait & tackle nearby

Closest shops to the lake and its boat launches. Call ahead for live bait and hours.

Search more bait shops near Lake Decatur ↗

Local tips

  • The entire lake is no wake from one-half hour after sunset to sunrise.
  • City boat registration is required; day passes are sold at the Lake Patrol office in Nelson Park.
  • Two pole-and-line fishing only; bow fishing and bullfrog spearing are not allowed.

View on interactive map

Zoom and pan on a street, satellite or terrain map. Red pins are boat launches; blue pins are bait shops nearby.

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Always wear a life jacket and check your state's current regulations before you fish.