Iowa's 8th Senate district


The 8th District of the Iowa Senate is located in Western Iowa, and is currently composed of Fremont, Harrison, and Mills counties, and the majority of Pottawattamie County.

Current elected officials

Mark Costello is the senator currently representing the 8th District.
The area of the 8th District contains two Iowa House of Representatives districts:
The district is also located in Iowa's 4th congressional district, which is represented by U.S. Representative Randy Feenstra.

Historical district boundaries

Source:
MapDescriptionYears effectiveNotes
Jefferson County1846-1851From 1846 to 1857, district numbering was not utilized by the Iowa State Legislature. This convention was added with the passing of the 1857 Iowa Constitution. Numbering of districts pre-1857 is done as a matter of historic convenience.
Davis County1852-1855
Wapello County1856-1859
Des Moines County1860-1863
Cass County
Fremont County
Mills County
Pottawattamie County		1864-1867
Adams County
Montgomery County
Page County
Taylor County
Union County		1868-1869
Adams County
Fremont County
Page County		1870-1873
Fremont County
Montgomery County
Page County		1874-1877
Adams County
Mills County
Montgomery County		1878-1883
Mills County
Montgomery County		1884-1962
Henry County
Jefferson County		1963-1966
Henry County
Louisa County
Washington County		1967-1970
Buena Vista County
Clay County
O'Brien County
Palo Alto County
Pocahontas County		1971-1972
Bremer County
Chickasaw County
Fayette County
Howard County
Winneshiek County 		1973-1982
Hancock County
Humboldt County
Kossuth County
Palo Alto County
Pocahontas County
Winnebago County 		1983-1992
Hancock County
Humboldt County
Kossuth County
Winnebago County
Wright County 		1993-2002
Allamakee County
Chickasaw County
Howard County
Winneshiek County		2003-2012
Pottawattamie County
2013-2022
Fremont CountyHarrison County
Mills County
Pottawattamie County
2023–Present