North Union Lake

Details

DNR lake ID

21009500

County

Douglas

Surface area

118 acres

Maximum depth

42 feet

Mean depth

5 feet

Shallow water (littoral) area

88 acres, 75% of the lake

Shoreline

4.1 miles

Average water clarity

15.0 feet (Secchi disk, 2 readings)

Nearest town (DNR)

Alexandria

Latest DNR fish survey

August 2018, standard survey

Surveys on record

7, since 1987

Game fish caught in the 2018 survey

bluegill 73, northern pike 21, pumpkinseed 12, black crappie 6, largemouth bass 4, walleye 2, hybrid sunfish 1, rock bass 1

Fish species recorded

black crappie, bluegill, green sunfish, hybrid sunfish, largemouth bass, northern pike, pumpkinseed, rock bass, walleye, yellow perch, and 15 other species

Public accesses (DNR survey record)

1, owned by

Infested waters list

zebra mussel

Fish consumption

Follow the statewide guidelines; fish from this lake have not been tested

Size

100 to 499 acres

Deepest point

30 to 59 feet

Public access

Yes

Sources

• Minnesota DNR LakeFinder
  Checked September 24, 2026

Survey catches show what DNR nets and electrofishing found on the survey date, not how the fishing is today. Check the current regulations and the Department of Health advice before you keep fish, and confirm access conditions before you tow a boat.