State wildlife area reservoir

Knox Lake

Knox County, Ohio

Knox Lake is a 469 acre reservoir about 1.5 miles northeast of Fredericktown in Knox County. It has standing timber in the upper end and a main boat ramp at the dam.

Air temp in Fredericktown, OH Loading current temperature…

Red pins match the numbered boat launches below. Map data © OpenStreetMap contributors.

Current air temperature at Knox Lake (National Weather Service) ↗

Surface area469 acres

Max depth24 ft

Shoreline11.4 mi

Boat motors10 hp (boats over 10 hp must run no-wake)

Species

Fishery rating out of 5.

Largemouth Bass●●●●○

Lake-specific 18 inch minimum

Crappie●●●○○

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

Bluegill●●●○○

Weed beds and shallow flats in late spring.

Channel Catfish●●●○○

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

Flathead Catfish●●●○○

Live bait around wood and rock at night.

Muskellunge●●○○○

Big baits along weed edges and rock bars, best in fall.

Boat launches

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

Main boat ramp at the damRamp
Renovated in 2020.Directions ↗
2North Shore RampRamp
Launch with dock or marina, SR. 95 & Co. Rd. 5 or Old Mansfield Road, Frederickstown. Motors over 10 HP are no-wake. (614) 644-3925.Directions ↗
3South Shore RampRamp
Launch with dock or marina, Buena Vista / Madison, Frederickstown. Motors over 10 HP are no-wake. (614) 644-3925.Directions ↗
4Old Mansfield Rd RampRamp
Public boat launch, Old Mansfield Rd, Frederickstown. Motors over 10 HP are no-wake. (614) 644-3925.Directions ↗
More public accessPublic
See the ODNR 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.

Species	Min size	Daily limit
Largemouth Bass Lake-specific rule, also applies to smallmouth and spotted bass	18 in	5
Smallmouth Bass Combined bass limit	18 in	5
Spotted Bass Combined bass limit	18 in	5

Other species in this lake: look up the limits at Ohio Department of Natural Resources, Division of Wildlife ↗

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

Bait & tackle nearby

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

Grandpa's Tackle BoxNearby
17811 Buena Vista Rd, Fredericktown, OH740-694-7385 Directions ↗

Search more bait shops near Knox Lake ↗

Local tips

Most of the lake is 12 feet deep or less. The deepest water is near the dam.
Standing timber in the upper basin holds fish. Fish it carefully.
Bass must be 18 inches or longer to keep, so most are catch and release.

View on interactive map

Zoom and pan on a street, satellite or terrain map. Red pins are boat launches.

More Ohio lakes

Seneca Lake Alum Creek Lake Buckeye Lake Salt Fork Lake Hoover Reservoir West Branch Reservoir (Michael J. Kirwan Reservoir) Caesar Creek Lake Tappan Lake All Ohio lakes →

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