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Williams Lake Water Details - IA

Williams Lake is a lake in Linn County, IA. Use this named-water page to check the map, current conditions, and nearby water-quality monitoring; confirm public access, regulations, advisories, and fishability with local sources before fishing.

This named-water page is not a claim that fishing is legal, safe, or productive here. Check public access, local regulations, fish-consumption advisories, and posted closures before fishing.

© OpenStreetMap contributors · open Williams Lake in OpenStreetMap or use coordinates 42.13507, -91.77555.

Current conditions & 3-day forecast

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Weather by Open-Meteo.

Water temperature & water-quality monitoring

Check the official EPA assessment (impaired-waters status and fish-consumption advisories) for Williams Lake at How’s My Waterway (EPA).

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Monitoring summaries from the Water Quality Portal.

State fishing records

Bighead Carp 112.00 lbs. (2018) — Iowa Department of Natural Resources
Bigmouth Buffalo 64.38 lbs. (2007) — Iowa Department of Natural Resources
Black Buffalo 63.38 lbs. (1999) — Iowa Department of Natural Resources
Black Bullhead 5.50 lbs. (1986) — Iowa Department of Natural Resources
Black Crappie 3.95 lbs. (2026) — Iowa Department of Natural Resources
Blue Catfish 105.00 lbs. (2025) — Iowa Department of Natural Resources
Blue Sucker 15.38 lbs. (2011) — Iowa Department of Natural Resources
Bluegill 3.13 lbs. (1986) — Iowa Department of Natural Resources
Bowfin 11.69 lbs. (1994) — Iowa Department of Natural Resources
Brook Trout 7.00 lbs. (1996) — Iowa Department of Natural Resources
Brown Bullhead 1.25 lbs. (2015) — Iowa Department of Natural Resources
Brown Trout 15.38 lbs. (1995) — Iowa Department of Natural Resources
Channel Catfish 38.13 lbs. (2005) — Iowa Department of Natural Resources
Common Carp 50.00 lbs. (1969) — Iowa Department of Natural Resources
Flathead Catfish 81.00 lbs. (1958) — Iowa Department of Natural Resources
Freshwater Drum 46.00 lbs. (1962) — Iowa Department of Natural Resources
Golden Redhorse 2.41 lbs. (2024) — Iowa Department of Natural Resources
Goldeye 2.94 lbs. (2004) — Iowa Department of Natural Resources
Grass Carp 85.50 lbs. (2007) — Iowa Department of Natural Resources
Greater Redhorse 8.20 lbs. (2022) — Iowa Department of Natural Resources
Green Sunfish 2.06 lbs. (2000) — Iowa Department of Natural Resources
Hybrid Crappie 4.08 lbs. (2024) — Iowa Department of Natural Resources
Largemouth Bass 10.75 lbs. (1984) — Iowa Department of Natural Resources
Longnose Gar 22.20 lbs. (2025) — Iowa Department of Natural Resources
Mooneye 1.52 lbs. (2016) — Iowa Department of Natural Resources
Muskellunge 50.38 lbs. (2000) — Iowa Department of Natural Resources
Northern Hog Sucker 1.91 lbs. (2019) — Iowa Department of Natural Resources
Northern Pike 25.31 lbs. (1977) — Iowa Department of Natural Resources
Ocean Striped Bass 9.25 lbs. (1983) — Iowa Department of Natural Resources
Orangespotted Sunfish 0.04 lbs. (2024) — Iowa Department of Natural Resources
Paddlefish 107.00 lbs. (1981) — Iowa Department of Natural Resources
Pumpkinseed 0.96 lbs. (2020) — Iowa Department of Natural Resources
Rainbow Trout 19.50 lbs. (1984) — Iowa Department of Natural Resources
Redear Sunfish 2.31 lbs. (2018) — Iowa Department of Natural Resources
River Carpsucker 2.30 lbs. (2026) — Iowa Department of Natural Resources
River Redhorse 7.48 lbs. (2020) — Iowa Department of Natural Resources
Rock Bass 1.50 lbs. (1973) — Iowa Department of Natural Resources
Sauger 6.50 lbs. (1976) — Iowa Department of Natural Resources
Saugeye 12.25 lbs. (2000) — Iowa Department of Natural Resources
Shorthead Redhorse 3.65 lbs. (2020) — Iowa Department of Natural Resources
Shortnose Gar 8.05 lbs. (2020) — Iowa Department of Natural Resources
Shovelnose Sturgeon 12.00 lbs. (1974) — Iowa Department of Natural Resources
Silver Carp 62.00 lbs. (2018) — Iowa Department of Natural Resources
Silver Redhorse 8.54 lbs. (2018) — Iowa Department of Natural Resources
Smallmouth Bass 7.75 lbs. (1980) — Iowa Department of Natural Resources
Smallmouth Buffalo 43.00 lbs. (2021) — Iowa Department of Natural Resources
Spotted Bass 2.32 lbs. (2025) — Iowa Department of Natural Resources
Tiger Muskie 27.13 lbs. (1989) — Iowa Department of Natural Resources
Walleye 14.50 lbs. (1986) — Iowa Department of Natural Resources
Warmouth 1.13 lbs. (2018) — Iowa Department of Natural Resources
White Bass 5.11 lbs. (2019) — Iowa Department of Natural Resources
White Crappie 4.56 lbs. (1981) — Iowa Department of Natural Resources
White Sucker 5.06 lbs. (2016) — Iowa Department of Natural Resources
Wiper (Hybrid Striped Bass) 19.63 lbs. (2005) — Iowa Department of Natural Resources
Yellow Bass 1.75 lbs. (1991) — Iowa Department of Natural Resources
Yellow Bullhead 2.60 lbs. (2024) — Iowa Department of Natural Resources
Yellow Perch 2.79 lbs. (2019) — Iowa Department of Natural Resources

Official IA state-record fish are published by the Iowa Department of Natural Resources — records there are the state's, not a MonsterRodHolders list.

Location facts

CountyLinn
Water typelake