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Lake Williamstown

Lake Williamstown is a 350-acre Grant County lake located about two miles east of Williamstown. A private excavation company built the lake in 1955 when they impounded the South Fork of Grassy Creek. It was open to fishing in 1957, and managed by the Army Corps of Engineers. This is the largest of all the Grant County lakes, and the city of Williamstown owns it. It includes commercial marinas, launches, and more than 300 beautiful lakefront properties that may be open to rent. The black and white speckled waterfowl Loon visits the lake during the early spring.

Enjoy yearly events such as the Labor Day Boat Parade and Paddle Williamstown and other summer festivities. Bass tournaments and water safety courses also are offered. The lake is under an expansion project that is expected to trip the size of the lake to supply more safe water to the surrounding areas.


If you would rather fish, you can expect to find largemouth bass, bluegill, white crappie, black crappie, redear sunfish, green sunfish, longear sunfish, channel catfish, black bullhead, yellow bullhead, and redhorse sucker.


   Search Lake Williamstown Resources
    Lake Williamstown KY Coordinates:
38.6781N -84.5191W
Map It:
Lake Type:
Surface Area:
350 acres
Maximum Depth:
70 ft
768 ft
Normal Water Clarity:
3 ft
Major City:
Cincinnati-Northern KY


The Williamstown Lake Water Sports Club is open to any individual or family that enjoys water activities. Although the club consists mostly of wake boarders and skiers, several members just enjoy being part of the group and watching. The club was formed in the summer of 2006 as an effort to bring all wake boarders and skiers on the lake together.

Boating In Kentucky

Boat License - Boat Certificate

Boat Courses

Boat Registration

Boat Equipment Requirements

Boat Insurance Kentucky


There is no lodging on the lake. Check Lake Resources Guide for local lake rentals, hotels and campsites.


The closest major city is Cincinnati. Other nearby Kentucky cities; Williamstown, Doughton, Locust Grove. The lake is located in Grant county.

Fun times at Lake Williamstown  lake williamstown

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Average Temperatures Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Avg. High  41 Avg. High  46 Avg. High  56 Avg. High  67 Avg. High  76 Avg. High  83 Avg. High  87 Avg. High  86 Avg. High  80 Avg. High  69 Avg. High  57 Avg. High  44
Avg. Low  24 Avg. Low  27 Avg. Low  35 Avg. Low  45 Avg. Low  54 Avg. Low  62 Avg. Low  66 Avg. Low  65 Avg. Low  58 Avg. Low  47 Avg. Low  38 Avg. Low  27