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Northern District of Iowa
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Southern District of Iowa
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| July 20, 1882 22 Stat. 172 |
Counties of Allamakee, Benton, Black Hawk, Bremer, Buchanan, Buena Vista, Butler, Calhoun, Cerro Gordo, Cherokee, Chickasaw, Clay, Clayton, Clinton, Delaware, Dickinson, Dubuque, Emmett, Fayette, Floyd, Franklin, Grundy, Hamilton, Hancock, Hardin, Howard, Humboldt, Ida, Jackson, Jones, Kossuth, Linn, Lyon, Mitchell, Monona, O'Brien, Osceola, Palo Alto, Plymouth, Pocahontas, Sac, Sioux, Webster, Winnebago, Winneshiek, Woodbury, Worth, and Wright. | Counties of Adair, Adams, Appanoose, Audubon, Boone, Carroll, Cass, Cedar, Clarke, Crawford, Dallas, Davis, Decatur, Des Moines, Fremont, Greene, Guthrie, Harrison, Henry, Iowa, Jasper, Jefferson, Johnson, Keokuk, Lee, Louisa, Lucas, Madison, Mahaska, Marion, Marshall, Mills, Monroe, Montgomery, Muscatine, Page, Polk, Pottawattamie, Poweshiek, Ringgold, Scott, Shelby, Story, Tama, Taylor, Union, Van Buren, Wapello, Warren, Washington, and Wayne. |
| February 24, 1891 26 Stat. 767 |
Counties of Allamakee, Benton, Black Hawk, Bremer, Buchanan, Buena Vista, Butler, Calhoun, Cedar, Cerro Gordo, Cherokee, Chickasaw, Clay, Clayton, Clinton, Delaware, Dickinson, Dubuque, Emmett, Fayette, Floyd, Franklin, Grundy, Hamilton, Hancock, Hardin, Howard, Humboldt, Ida, Iowa, Jackson, Johnson, Jones, Kossuth, Linn, Lyon, Mitchell, Monona, O'Brien, Osceola, Palo Alto, Plymouth, Pocahontas, Sac, Sioux, Tama, Webster, Winnebago, Winneshiek, Woodbury, Worth, and Wright. | Counties of Adair, Adams, Appanoose, Audubon, Boone, Carroll, Cass, Clarke, Crawford, Dallas, Davis, Decatur, Des Moines, Fremont, Greene, Guthrie, Harrison, Henry, Jasper, Jefferson, Keokuk, Lee, Louisa, Lucas, Madison, Mahaska, Marion, Marshall, Mills, Monroe, Montgomery, Muscatine, Page, Polk, Pottawattamie, Poweshiek, Ringgold, Scott, Shelby, Story, Taylor, Union, Van Buren, Wapello, Warren, Washington, and Wayne. |
| June 19, 1906 34 Stat. 304 |
Counties of Allamakee, Benton, Black Hawk, Bremer, Buchanan, Buena Vista, Butler, Calhoun, Cedar, Cerro Gordo, Cherokee, Chickasaw, Clay, Clayton, Delaware, Dickinson, Dubuque, Emmett, Fayette, Floyd, Franklin, Grundy, Hamilton, Hancock, Hardin, Howard, Humboldt, Ida, Iowa, Jackson, Johnson, Jones, Kossuth, Linn, Lyon, Mitchell, Monona, O'Brien, Osceola, Palo Alto, Plymouth, Pocahontas, Sac, Sioux, Tama, Webster, Winnebago, Winneshiek, Woodbury, Worth, and Wright. | Counties of Adair, Adams, Appanoose, Audubon, Boone, Carroll, Cass, Clarke, Clinton, Crawford, Dallas, Davis, Decatur, Des Moines, Fremont, Greene, Guthrie, Harrison, Henry, Jasper, Jefferson, Keokuk, Lee, Louisa, Lucas, Madison, Mahaska, Marion, Marshall, Mills, Monroe, Montgomery, Muscatine, Page, Polk, Pottawattamie, Poweshiek, Ringgold, Scott, Shelby, Story, Taylor, Union, Van Buren, Wapello, Warren, Washington, and Wayne. |
| March 3, 1913 37 Stat. 734 |
Counties of Allamakee, Benton, Black Hawk, Bremer, Buchanan, Buena Vista, Butler, Calhoun, Carroll, Cedar, Cerro Gordo, Cherokee, Chickasaw, Clay, Clayton, Delaware, Dickinson, Dubuque, Emmett, Fayette, Floyd, Franklin, Grundy, Hamilton, Hancock, Hardin, Howard, Humboldt, Ida, Iowa, Jackson, Johnson, Jones, Kossuth, Linn, Lyon, Mitchell, Monona, O'Brien, Osceola, Palo Alto, Plymouth, Pocahontas, Sac, Sioux, Tama, Webster, Winnebago, Winneshiek, Woodbury, Worth, and Wright. | Counties of Adair, Adams, Appanoose, Audubon, Boone, Cass, Clarke, Clinton, Crawford, Dallas, Davis, Decatur, Des Moines, Fremont, Greene, Guthrie, Harrison, Henry, Jasper, Jefferson, Keokuk, Lee, Louisa, Lucas, Madison, Mahaska, Marion, Marshall, Mills, Monroe, Montgomery, Muscatine, Page, Polk, Pottawattamie, Poweshiek, Ringgold, Scott, Shelby, Story, Taylor, Union, Van Buren, Wapello, Warren, Washington, and Wayne. |
| April 27, 1916 39 Stat. 55 |
Counties of Allamakee, Benton, Black Hawk, Bremer, Buchanan, Buena Vista, Butler, Calhoun, Carroll, Cedar, Cerro Gordo, Cherokee, Chickasaw, Clay, Clayton, Delaware, Dickinson, Dubuque, Emmett, Fayette, Floyd, Franklin, Grundy, Hamilton, Hancock, Hardin, Howard, Humboldt, Ida, Iowa, Jackson, Jones, Kossuth, Linn, Lyon, Mitchell, Monona, O'Brien, Osceola, Palo Alto, Plymouth, Pocahontas, Sac, Sioux, Tama, Webster, Winnebago, Winneshiek, Woodbury, Worth, and Wright. | Counties of Adair, Adams, Appanoose, Audubon, Boone, Cass, Clarke, Clinton, Crawford, Dallas, Davis, Decatur, Des Moines, Fremont, Greene, Guthrie, Harrison, Henry, Jasper, Jefferson, Johnson, Keokuk, Lee, Louisa, Lucas, Madison, Mahaska, Marion, Marshall, Mills, Monroe, Montgomery, Muscatine, Page, Polk, Pottawattamie, Poweshiek, Ringgold, Scott, Shelby, Story, Taylor, Union, Van Buren, Wapello, Warren, Washington, and Wayne. |
| July 5, 1937 50 Stat. 474 |
Counties of Allamakee, Benton, Black Hawk, Bremer, Buchanan, Buena Vista, Butler, Calhoun, Carroll, Cedar, Cerro Gordo, Cherokee, Chickasaw, Clay, Clayton, Crawford, Delaware, Dickinson, Dubuque, Emmett, Fayette, Floyd, Franklin, Grundy, Hamilton, Hancock, Hardin, Howard, Humboldt, Ida, Iowa, Jackson, Jones, Kossuth, Linn, Lyon, Mitchell, Monona, O'Brien, Osceola, Palo Alto, Plymouth, Pocahontas, Sac, Sioux, Tama, Webster, Winnebago, Winneshiek, Woodbury, Worth, and Wright. | Counties of Adair, Adams, Appanoose, Audubon, Boone, Cass, Clarke, Clinton, Dallas, Davis, Decatur, Des Moines, Fremont, Greene, Guthrie, Harrison, Henry, Jasper, Jefferson, Johnson, Keokuk, Lee, Louisa, Lucas, Madison, Mahaska, Marion, Marshall, Mills, Monroe, Montgomery, Muscatine, Page, Polk, Pottawattamie, Poweshiek, Ringgold, Scott, Shelby, Story, Taylor, Union, Van Buren, Wapello, Warren, Washington, and Wayne. |
| *Historical county information obtained from William M. Scholl Center for American History and Culture, Atlas of Historical County Boundaries, at The Newberry Library. | ||