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Thayer Lake

General Information

County: Union
Location: 1 mile south of Thayer
Acres: 11.00
Maximum Depth: 13 ft. (2014)
Motoring Restrictions: Electric Motors Only

Nearby Parks


Amenities at Thayer Lake include:
  • Boat Access
  • Picnic Area
  • Restrooms
  • Camping
  • Good/Excellent Shorefishing
  • Hard Surface Boat Ramp
No recent updates
Download Printable Lake Map
Download Printable Fishing Structures Map

You can zoom in on the map for bathymetric information for some lakes

  • 09/09/2021 - 60 Channel Catfish (8.1)
  • 09/17/2019 - 60 Channel Catfish (8.6)
  • 9/27/2017 - 59 Channel Catfish (9.3")
  • 09/15/2015 - 110 Channel Catfish (8")
  • Curlyleaf Pondweed
The Fishing Regulations brochure is available for download. The summaries listed below are a partial listing provided for your benefit.

  • Black Crappie
    • Season: Continuous
    • Daily Bag Limit: combined black and white crappie, 25 fish
    • Possession Limit: unlimited
    • Length Limit: none
    • Other: No daily limit on private waters
  • Channel Catfish
    • Season: Continuous
    • Daily Bag Limit: combined: channel, blue and flathead catfish, 8 fish
    • Possession Limit: combined: channel, blue and flathead catfish, 30 fish
    • Length Limit: none
    • Other:
  • Largemouth Bass
    • Season: Continuous
    • Daily Bag Limit: combined black bass, 3 fish
    • Possession Limit: combined black bass, 6 fish
    • Length Limit: 15-inch minimum
    • Other:
Spring electrofishing indicated good numbers of largemouth bass up to 17 inches. Moderate numbers of crappie were sampled in 2021 with most crappie in the 8-10 inch length range, but some larger crappie are available to anglers. Bluegill were also sampled in moderate abundance. Most bluegill were less than 8 inches in length, but some larger bluegill are available to anglers.(2021)
Tip: Click the arrow in the lower right corner to view the Fish Survey Data tool in full-screen mode.


Iowa-Caught Fish Are Safe to Eat, In Almost All Cases

The vast majority of Iowa’s streams, rivers and lakes offer safe and high-quality fish that pose little or no threat to human health if consumed. Some limitations may apply for young children and pregnant women. Here’s a Fish Consumption Fact Sheet from the Iowa DNR and the Iowa Dept. of Public Health for more information. Here is a list of current fish consumption advisories for Iowa lakes and rivers.