FIPS Code | State | County name | 1993 Rural-urban continuum code | Description | County population 1990 |
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| 18001 | IN | Adams County | 2 | County in metro area of 250,000 to 1 million population | 31,095 | | 18003 | IN | Allen County | 2 | County in metro area of 250,000 to 1 million population | 300,836 | | 18005 | IN | Bartholomew County | 4 | Nonmetro county with urban pop. of 20,000 or more, adjacent to a metro area | 63,657 | | 18007 | IN | Benton County | 8 | Nonmetro county completely rural or less than 2,500 urban pop., adj. to metro area | 9,441 | | 18009 | IN | Blackford County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 14,067 | | 18011 | IN | Boone County | 1 | Fringe county of a metro area with 1 million population or more | 38,147 | | 18013 | IN | Brown County | 8 | Nonmetro county completely rural or less than 2,500 urban pop., adj. to metro area | 14,080 | | 18015 | IN | Carroll County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 18,809 | | 18017 | IN | Cass County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 38,413 | | 18019 | IN | Clark County | 2 | County in metro area of 250,000 to 1 million population | 87,777 | | 18021 | IN | Clay County | 3 | County in metro area of fewer than 250,000 population | 24,705 | | 18023 | IN | Clinton County | 3 | County in metro area of fewer than 250,000 population | 30,974 | | 18025 | IN | Crawford County | 8 | Nonmetro county completely rural or less than 2,500 urban pop., adj. to metro area | 9,914 | | 18027 | IN | Daviess County | 7 | Nonmetro county with urban pop. of 2,500-19,999, not adjacent to a metro area | 27,533 | | 18029 | IN | Dearborn County | 1 | Fringe county of a metro area with 1 million population or more | 38,835 | | 18031 | IN | Decatur County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 23,645 | | 18033 | IN | DeKalb County | 2 | County in metro area of 250,000 to 1 million population | 35,324 | | 18035 | IN | Delaware County | 3 | County in metro area of fewer than 250,000 population | 119,659 | | 18037 | IN | Dubois County | 7 | Nonmetro county with urban pop. of 2,500-19,999, not adjacent to a metro area | 36,616 | | 18039 | IN | Elkhart County | 3 | County in metro area of fewer than 250,000 population | 156,198 | | 18041 | IN | Fayette County | 7 | Nonmetro county with urban pop. of 2,500-19,999, not adjacent to a metro area | 26,015 | | 18043 | IN | Floyd County | 2 | County in metro area of 250,000 to 1 million population | 64,404 | | 18045 | IN | Fountain County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 17,808 | | 18047 | IN | Franklin County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 19,580 | | 18049 | IN | Fulton County | 7 | Nonmetro county with urban pop. of 2,500-19,999, not adjacent to a metro area | 18,840 | | 18051 | IN | Gibson County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 31,913 | | 18053 | IN | Grant County | 4 | Nonmetro county with urban pop. of 20,000 or more, adjacent to a metro area | 74,169 | | 18055 | IN | Greene County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 30,410 | | 18057 | IN | Hamilton County | 0 | Central county of a metro area with 1 million population or more | 108,936 | | 18059 | IN | Hancock County | 1 | Fringe county of a metro area with 1 million population or more | 45,527 | | 18061 | IN | Harrison County | 2 | County in metro area of 250,000 to 1 million population | 29,890 | | 18063 | IN | Hendricks County | 1 | Fringe county of a metro area with 1 million population or more | 75,717 | | 18065 | IN | Henry County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 48,139 | | 18067 | IN | Howard County | 3 | County in metro area of fewer than 250,000 population | 80,827 | | 18069 | IN | Huntington County | 2 | County in metro area of 250,000 to 1 million population | 35,427 | | 18071 | IN | Jackson County | 7 | Nonmetro county with urban pop. of 2,500-19,999, not adjacent to a metro area | 37,730 | | 18073 | IN | Jasper County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 24,960 | | 18075 | IN | Jay County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 21,512 | | 18077 | IN | Jefferson County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 29,797 | | 18079 | IN | Jennings County | 7 | Nonmetro county with urban pop. of 2,500-19,999, not adjacent to a metro area | 23,661 | | 18081 | IN | Johnson County | 0 | Central county of a metro area with 1 million population or more | 88,109 | | 18083 | IN | Knox County | 5 | Nonmetro county with urban pop. of 20,000 or more, not adjacent to a metro area | 39,884 | | 18085 | IN | Kosciusko County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 65,294 | | 18087 | IN | LaGrange County | 8 | Nonmetro county completely rural or less than 2,500 urban pop., adj. to metro area | 29,477 | | 18089 | IN | Lake County | 0 | Central county of a metro area with 1 million population or more | 475,594 | | 18091 | IN | LaPorte County | 4 | Nonmetro county with urban pop. of 20,000 or more, adjacent to a metro area | 107,066 | | 18093 | IN | Lawrence County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 42,836 | | 18095 | IN | Madison County | 3 | County in metro area of fewer than 250,000 population | 130,669 | | 18097 | IN | Marion County | 0 | Central county of a metro area with 1 million population or more | 797,159 | | 18099 | IN | Marshall County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 42,182 | | 18101 | IN | Martin County | 7 | Nonmetro county with urban pop. of 2,500-19,999, not adjacent to a metro area | 10,369 | | 18103 | IN | Miami County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 36,897 | | 18105 | IN | Monroe County | 3 | County in metro area of fewer than 250,000 population | 108,978 | | 18107 | IN | Montgomery County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 34,436 | | 18109 | IN | Morgan County | 1 | Fringe county of a metro area with 1 million population or more | 55,920 | | 18111 | IN | Newton County | 8 | Nonmetro county completely rural or less than 2,500 urban pop., adj. to metro area | 13,551 | | 18113 | IN | Noble County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 37,877 | | 18115 | IN | Ohio County | 1 | Fringe county of a metro area with 1 million population or more | 5,315 | | 18117 | IN | Orange County | 7 | Nonmetro county with urban pop. of 2,500-19,999, not adjacent to a metro area | 18,409 | | 18119 | IN | Owen County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 17,281 | | 18121 | IN | Parke County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 15,410 | | 18123 | IN | Perry County | 7 | Nonmetro county with urban pop. of 2,500-19,999, not adjacent to a metro area | 19,107 | | 18125 | IN | Pike County | 8 | Nonmetro county completely rural or less than 2,500 urban pop., adj. to metro area | 12,509 | | 18127 | IN | Porter County | 1 | Fringe county of a metro area with 1 million population or more | 128,932 | | 18129 | IN | Posey County | 2 | County in metro area of 250,000 to 1 million population | 25,968 | | 18131 | IN | Pulaski County | 9 | Nonmetro county completely rural or less than 2,500 urban pop., not adj. to metro area | 12,643 | | 18133 | IN | Putnam County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 30,315 | | 18135 | IN | Randolph County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 27,148 | | 18137 | IN | Ripley County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 24,616 | | 18139 | IN | Rush County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 18,129 | | 18141 | IN | St. Joseph County | 3 | County in metro area of fewer than 250,000 population | 247,052 | | 18143 | IN | Scott County | 2 | County in metro area of 250,000 to 1 million population | 20,991 | | 18145 | IN | Shelby County | 1 | Fringe county of a metro area with 1 million population or more | 40,307 | | 18147 | IN | Spencer County | 8 | Nonmetro county completely rural or less than 2,500 urban pop., adj. to metro area | 19,490 | | 18149 | IN | Starke County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 22,747 | | 18151 | IN | Steuben County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 27,446 | | 18153 | IN | Sullivan County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 18,993 | | 18155 | IN | Switzerland County | 8 | Nonmetro county completely rural or less than 2,500 urban pop., adj. to metro area | 7,738 | | 18157 | IN | Tippecanoe County | 3 | County in metro area of fewer than 250,000 population | 130,598 | | 18159 | IN | Tipton County | 3 | County in metro area of fewer than 250,000 population | 16,119 | | 18161 | IN | Union County | 8 | Nonmetro county completely rural or less than 2,500 urban pop., adj. to metro area | 6,976 | | 18163 | IN | Vanderburgh County | 2 | County in metro area of 250,000 to 1 million population | 165,058 | | 18165 | IN | Vermillion County | 3 | County in metro area of fewer than 250,000 population | 16,773 | | 18167 | IN | Vigo County | 3 | County in metro area of fewer than 250,000 population | 106,107 | | 18169 | IN | Wabash County | 7 | Nonmetro county with urban pop. of 2,500-19,999, not adjacent to a metro area | 35,069 | | 18171 | IN | Warren County | 8 | Nonmetro county completely rural or less than 2,500 urban pop., adj. to metro area | 8,176 | | 18173 | IN | Warrick County | 2 | County in metro area of 250,000 to 1 million population | 44,920 | | 18175 | IN | Washington County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 23,717 | | 18177 | IN | Wayne County | 5 | Nonmetro county with urban pop. of 20,000 or more, not adjacent to a metro area | 71,951 | | 18179 | IN | Wells County | 2 | County in metro area of 250,000 to 1 million population | 25,948 | | 18181 | IN | White County | 6 | Nonmetro county with urban pop. of 2,500-19,999, adjacent to a metro area | 23,265 | | 18183 | IN | Whitley County | 2 | County in metro area of 250,000 to 1 million population | 27,651 |
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