Iowa District Court Jurisdictions

 U.S. District and Other Courts in Iowa 1845-1981  U.S. District Court for the Northern District
 * Eastern Division (Dubuque)
 * Central Division (Fort Dodge)
 * Western Division (Sioux City)
 * Cedar Rapids Division
 * U.S. Circuit Court for the Northern District
 * Eastern Division (Dubuque)
 * Central Division (Fort Dodge)
 * Western Division (Sioux City)
 * Cedar Rapids Division
 * U.S. District Court for the Southern District
 * Eastern Division (Keokuk)
 * Central Division (Des Moines
 * Middle Division (Iowa City)
 * Southern Division (Creston)
 * Southern Division (Burlington)
 * Western Division (Council Bluffs)
 * Davenport Division
 * Ottumwa Division
 * U.S. Circuit Court for the Southern District
 * Eastern Division (Keokuk)
 * Central Division (Des Moines)
 * Southern Division (Creston)
 * Western Division (Council Bluffs)
 * Davenport Division
 * Ottumwa Division

 Related Family History Library Holdings  https://www.familysearch.org/search/catalog/712469? Petitions granted & continued, 1930-1935; Naturalizations, 1919-1926. Southern Division. Ottumwa Division]
 * Naturalization records, 1910-1936. Cedar Rapids Division
 * General index to declaration of intention and petitions, 1909-1948; declaration of intention, 1917-1936; petitions, 1909-1936. Central Division
 * Bankruptcy docket, 1859-1869 Eastern Division.
 * Declarations of intention and miscellaneous papers, 1849-1888. Eastern Division
 * Declarations of intention, 1914-1936; petitions, 1915-1936. Eastern Division.
 * Lists of persons naturalized, 1853-1874. Eastern Division.
 * Naturalization related records, 1930-1936. Southern District. Creston Division
 * Naturalization records, 1915-1936; some 1951 letters of amendment for earlier petitions. Southern Division. Des Moines Division.