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Diamond Lake

General Information

County: Poweshiek
Location: 1 mile West of Montezuma
Acres: 98.00
Maximum Depth: 19.8 ft. (2013)
Motoring Restrictions: Electric Motors Only

Nearby Parks

Amenities

Amenities at Diamond Lake include:
  • Boat Access
  • Fishing Jetty
  • Picnic Area
  • Trails
  • Accessible Facilities
  • Playground
  • Restrooms
  • Camping
  • Good/Excellent Shorefishing
  • Hard Surface Boat Ramp
  • Accessible Shoreline

No recent updates

Lake Maps

Download Printable Lake Map
Download Printable Fishing Structures Map

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

  • 09/13/2021 - 1,764 Channel Catfish (8.8)
  • 10/01/2019 - 1,767 Channel Catfish (9.6)
  • 09/26/2018 - 1,780 Channel Catfish (8.7)
  • fall 2016 - 1,765 Channel Catfish (9.1")
  • 09/16/2014 - 1,764 Channel Catfish (8")

    No known aquatic invasive species have been found

The Fishing Regulations brochure is available for download. The summaries listed below are a partial listing provided for your benefit.

  • Black Bullhead
    • Season: Continuous
    • Daily Bag Limit: unlimited
    • Possession Limit: unlimited
    • Length Limit: none
    • Other:
  • 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
  • Bluegill
    • Season: Continuous
    • Daily Bag Limit: 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:
  • Common Carp
    • Season: Continuous
    • Daily Bag Limit: none
    • Possession Limit: unlimited
    • Length Limit: none
    • Other: May be taken by hand fishing, by snagging, by spear or by bow and arrow, day or night.
  • 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:
  • Walleye
    • Season: Continuous
    • Daily Bag Limit: combined walleye, sauger and saugeye; 5 fish
    • Possession Limit: combined walleye, sauger and saugeye; 10 fish
    • Length Limit: none
    • Other:
  • White 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
  • Yellow Bass
    • Season: Continuous
    • Daily Bag Limit: none
    • Possession Limit: unlimited
    • Length Limit: none
    • Other:

Good numbers of bluegill up to 8-inches. There are some redear sunfish here that are mostly 7- to 9-inches. Crappie numbers are good with two sizes represented most often; 6 1/2-inch fish and the 8- to 9-inch fish. Common carp are taking hold with large numbers of 14- to 20-inch fish. Channel catfish numbers are good with 12- to 19-inch fish most common. Largemouth bass numbers are fair with all sizes of bass up to 21-inches. (2015)

Tip: Click the arrow in the lower right corner to view the Fish Survey Data tool in full-screen mode.

Contacts

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.