Name of County
|
Date Formed
|
Boundary Changes
|
Parent County
|
Counties Created by Boundary Changes
|
Adams
|
1835 Feb 07
|
Details
|
Warren
|
none
|
Allen
|
1823 Dec 17
|
Details
|
Indian lands
|
DeKalb 1835, Wells 1835
|
Bartholomew
|
1821 Jan 08
|
Details
|
Indian lands
|
none
|
Benton
|
1840 Feb 18
|
Details
|
Indian lands
|
none
|
Blackford
|
1838 Feb 15
|
Details
|
Jay
|
none
|
Boone
|
1831 Jan 29
|
Details
|
Indian lands
|
none
|
Brown
|
1836 Feb 04
|
Details
|
Morgan, Johnson, Monroe, Lawrence
|
none
|
Carroll
|
1828 Jan 07
|
Details
|
Indian lands
|
White 1834
|
Cass
|
1828 Dec 18
|
Details
|
Indian lands
|
Miami 1832, Pulask 1835
|
Clark
|
1801 Feb 03
|
Details
|
Knox
|
Floyd 1819, Scott 1820
|
Clay
|
1825 Feb 12
|
Details
|
Indian lands
|
none
|
Clinton
|
1830 Jan 29
|
Details
|
Indian lands
|
none
|
Crawford
|
1818 Jan 29
|
Details
|
Harrison
|
Orange 1815
|
Daviess
|
1816 Jan 24
|
Details
|
Indian lands
|
none
|
Dearborn
|
1803 Mar 07
|
Details
|
Indiana Territory
|
Ohio 1844, Orange 1815
|
Decatur
|
1821 Dec 31
|
Details
|
Indian lands
|
none
|
DeKalb
|
1835 Feb 07
|
Details
|
Allen
|
none
|
Delaware
|
1827 Jan 26
|
Details
|
Indian lands
|
Grant 1831, Morgan 1822
|
Dubois
|
1817 Dec 20
|
Details
|
Orange, Perry
|
none
|
Elkhart
|
1830 Jan 29
|
Details
|
Indian lands
|
Noble 1835
|
Fayette
|
1818 Dec 28
|
Details
|
Wayne
|
Madison 1823
|
Floyd
|
1819 Jan 02
|
Details
|
Harrison, Clark
|
none
|
Fountain
|
1825 Dec 20
|
Details
|
Montgomery
|
none
|
Franklin
|
1810 Nov 27
|
Details
|
Wayne, Ripley
|
Rush 1821
|
Fulton
|
1835 Feb 07
|
Details
|
Indian lands
|
none
|
Gibson
|
1813 Mar 09
|
Details
|
Knox
|
none
|
Grant
|
1831 Feb 10
|
Details
|
Delaware
|
Huntington 1832
|
Greene
|
1821 Jan 05
|
Details
|
Knox
|
none
|
Hamilton
|
1823 Jan 08
|
Details
|
Hancock, Marion
|
Tipton 1844
|
Hancock
|
1827 Jan 26
|
Details
|
Madison
|
Hamilton 1823
|
Harrison
|
1808 Oct 11
|
Details
|
Indiana Territory
|
Crawford 1818, Floyd 1819, Perry 1814
|
Hendricks
|
1823 Dec 20
|
Details
|
Indian lands
|
none
|
Henry
|
1821 Dec 31
|
Details
|
Indian lands
|
none
|
Howard
|
1846 Dec 28
|
Details
|
renamed from Richardsville
|
none
|
Huntington
|
1832 Feb 02
|
Details
|
Grant
|
Wabash 1832, Wells 1835, Whitley 1835
|
Jackson
|
1815 Dec 18
|
Details
|
Washington
|
Scott 1820
|
Jasper
|
1835 Feb 07
|
Details
|
Indian lands
|
Newton 1835
|
Jay
|
1835 Feb 07
|
Details
|
Randolph
|
Blackford 1838
|
Jefferson
|
1810 Nov 23
|
Details
|
Indian lands
|
none
|
Jennings
|
1816 Dec 27
|
Details
|
Indian lands
|
none
|
Johnson
|
1822 Dec 31
|
Details
|
Indian lands
|
Brown 1836
|
Knox
|
1790 Jun 20
|
Details
|
Northwest Territory
|
Clark 1801, Gibson 1813, Green 1821, Posey 1814
|
Kosciusko
|
1835 Feb 07
|
Details
|
Indian lands
|
none
|
LaGrange
|
1832 Feb 02
|
Details
|
state lands
|
none
|
Lake
|
1836 Jan 28
|
Details
|
Porter, Newton
|
none
|
La Porte
|
1832 Jan 09
|
Details
|
Indian lands
|
none
|
Lawrence
|
1818 Jan 07
|
Details
|
Orange
|
Brown 1836
|
Madison
|
1823 Jan 04
|
Details
|
Fayette
|
Hancock 1827
|
Marion
|
1821 Dec 31
|
Details
|
Ohio
|
Hamilton 1823
|
Marshall
|
1835 Feb 07
|
Details
|
Indian lands
|
Starke 1835
|
Martin
|
1820 Jan 17
|
Details
|
Indian lands
|
none
|
Miami
|
1832 Feb 02
|
Details
|
Cass
|
none
|
Monroe
|
1818 Jan 14
|
Details
|
Orange
|
Brown 1836, Morgan 1821
|
Montgomery
|
1822 Dec 21
|
Details
|
Indian lands
|
Fountain 1825, Tippecanoe 1826
|
Morgan
|
1821 Dec 31
|
Details
|
Monroe
|
Brown 1836
|
Newton
|
1835 Feb 07
|
Details
|
Jasper
|
Lake 1836
|
Noble
|
1835 Feb 07
|
Details
|
Elkhart
|
none
|
Ohio
|
1844 Jan 04
|
Details
|
Dearborn
|
Marion 1821
|
Orange
|
1815 Dec 26
|
Details
|
Dearborn
|
Dubois 1817, Lawrence 1818, Monroe 1818
|
Owen
|
1818 Dec 21
|
Details
|
Indian lands
|
none
|
Parke
|
1821 Jan 09
|
Details
|
Indian lands
|
Vermillion 1824
|
Perry
|
1814 Sep 07
|
Details
|
Harrison, Warrick
|
Dubois 1817
|
Pike
|
1816 Dec 21
|
Details
|
Indian lands
|
none
|
Porter
|
1835 Feb 07
|
Details
|
Indian lands
|
Lake 1836
|
Posey
|
1814 Sep 07
|
Details
|
Knox
|
none
|
Pulaski
|
1835 Feb 07
|
Details
|
Cass
|
none
|
Putnam
|
1821 Dec 31
|
Details
|
Indian lands
|
none
|
Randolph (new)
|
1818 Jan 10
|
Details
|
Wayne
|
Jay 1835
|
Ripley
|
1816 Dec 27
|
Details
|
Indian lands
|
Franklin 1810
|
Rush
|
1821 Dec 31
|
Details
|
Franklin
|
none
|
St. Joseph
|
1830 Jan 29
|
Details
|
Indian lands
|
none
|
Scott
|
1820 Jan 12
|
Details
|
Clark, Jackson
|
none
|
Shelby
|
1821 Dec 31
|
Details
|
Indian lands
|
none
|
Spencer
|
1818 Jan 10
|
Details
|
Warwick
|
none
|
Starke
|
1835 Feb 07
|
Details
|
Marshall
|
none
|
Steuben
|
1835 Feb 07
|
Details
|
Indian lands
|
none
|
Sullivan
|
1816 Dec 30
|
Details
|
Indiana Territory
|
none
|
Switzerland
|
1814 sep 07
|
Details
|
Indian lands
|
none
|
Tippecanoe
|
1826 Jan 20
|
Details
|
Montgomery
|
none
|
Tipton
|
1844 Jan 15
|
Details
|
Hamilton
|
none
|
Union
|
1821 Jan 05
|
Details
|
Wayne
|
none
|
Vanderburgh
|
1818 Jan 07
|
Details
|
Indian lands
|
none
|
Vermillion
|
1824 Jan 02
|
Details
|
Parke
|
none
|
Vigo
|
1818 Jan 21
|
Details
|
Indian lands
|
none
|
Warren
|
1827 Jan 19
|
Details
|
Indian lands
|
Adams 1835
|
Washington
|
1813 Dec 21
|
Details
|
Indian lands
|
Jackson 1815
|
Wayne
|
an 01 Ja 81
|
Details
|
Indiana Territory
|
Clark, Dearborn, Knox
|
Wells
|
1835 Feb 07
|
Details
|
Huntington, Allen
|
none
|
White
|
1834 Feb 01
|
Details
|
Carroll
|
none
|
Whitley
|
1835 Feb 07
|
Details
|
Huntington
|
none
|