The area of Northwest Montana Wetland Management District is 59.699 square kilometers.
Leopold Wetland Management District was created in 1993.
Madison Wetland Management District was created in 1962.
Waubay Wetland Management District was created in 1959.
Louisiana Wetland Management District was created in 1990.
Arrowwood Wetland Management District was created in 1961-09.
Benton Lake Wetland Management District was created in 1975.
The area of Huron Wetland Management District is 70.893 square kilometers.
Huron Wetland Management District was created on 1992-05-31.
Sand Lake Wetland Management District was created in 1961.
The area of Madison Wetland Management District is 524.877 square kilometers.
Lake Andes Wetland Management District was created in 1961.