FIPS Code | State | County name | 2003 urban influence code | Description | 2000 population |
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| 16001 | ID | Ada County | 2 | Small-in a metro area with fewer than 1 million residents | 300,904 | | 16003 | ID | Adams County | 7 | Noncore adjacent to a small metro and does not contain a town of at least 2,500 residents | 3,476 | | 16005 | ID | Bannock County | 2 | Small-in a metro area with fewer than 1 million residents | 75,565 | | 16007 | ID | Bear Lake County | 11 | Noncore not adjacent to a metro/micro area and contains a town of 2,500 or more residents | 6,411 | | 16009 | ID | Benewah County | 6 | Noncore adjacent to a small metro with town of at least 2,500 residents | 9,171 | | 16011 | ID | Bingham County | 5 | Micropolitan adjacent to a small metro area | 41,735 | | 16013 | ID | Blaine County | 11 | Noncore not adjacent to a metro/micro area and contains a town of 2,500 or more residents | 18,991 | | 16015 | ID | Boise County | 2 | Small-in a metro area with fewer than 1 million residents | 6,670 | | 16017 | ID | Bonner County | 6 | Noncore adjacent to a small metro with town of at least 2,500 residents | 36,835 | | 16019 | ID | Bonneville County | 2 | Small-in a metro area with fewer than 1 million residents | 82,522 | | 16021 | ID | Boundary County | 11 | Noncore not adjacent to a metro/micro area and contains a town of 2,500 or more residents | 9,871 | | 16023 | ID | Butte County | 7 | Noncore adjacent to a small metro and does not contain a town of at least 2,500 residents | 2,899 | | 16025 | ID | Camas County | 12 | Noncore not adjacent to a metro/micro area and does not contain a town of at least 2,500 residents | 991 | | 16027 | ID | Canyon County | 2 | Small-in a metro area with fewer than 1 million residents | 131,441 | | 16029 | ID | Caribou County | 6 | Noncore adjacent to a small metro with town of at least 2,500 residents | 7,304 | | 16031 | ID | Cassia County | 8 | Micropolitan not adjacent to a metro area | 21,416 | | 16033 | ID | Clark County | 7 | Noncore adjacent to a small metro and does not contain a town of at least 2,500 residents | 1,022 | | 16035 | ID | Clearwater County | 6 | Noncore adjacent to a small metro with town of at least 2,500 residents | 8,930 | | 16037 | ID | Custer County | 12 | Noncore not adjacent to a metro/micro area and does not contain a town of at least 2,500 residents | 4,342 | | 16039 | ID | Elmore County | 5 | Micropolitan adjacent to a small metro area | 29,130 | | 16041 | ID | Franklin County | 2 | Small-in a metro area with fewer than 1 million residents | 11,329 | | 16043 | ID | Fremont County | 5 | Micropolitan adjacent to a small metro area | 11,819 | | 16045 | ID | Gem County | 2 | Small-in a metro area with fewer than 1 million residents | 15,181 | | 16047 | ID | Gooding County | 9 | Noncore adjacent to micro area and contains a town of 2,500- 9,999 residents | 14,155 | | 16049 | ID | Idaho County | 6 | Noncore adjacent to a small metro with town of at least 2,500 residents | 15,511 | | 16051 | ID | Jefferson County | 2 | Small-in a metro area with fewer than 1 million residents | 19,155 | | 16053 | ID | Jerome County | 8 | Micropolitan not adjacent to a metro area | 18,342 | | 16055 | ID | Kootenai County | 2 | Small-in a metro area with fewer than 1 million residents | 108,685 | | 16057 | ID | Latah County | 5 | Micropolitan adjacent to a small metro area | 34,935 | | 16059 | ID | Lemhi County | 11 | Noncore not adjacent to a metro/micro area and contains a town of 2,500 or more residents | 7,806 | | 16061 | ID | Lewis County | 7 | Noncore adjacent to a small metro and does not contain a town of at least 2,500 residents | 3,747 | | 16063 | ID | Lincoln County | 10 | Noncore adjacent to micro area and does not contain a town of at least 2,500 residents | 4,044 | | 16065 | ID | Madison County | 5 | Micropolitan adjacent to a small metro area | 27,467 | | 16067 | ID | Minidoka County | 8 | Micropolitan not adjacent to a metro area | 20,174 | | 16069 | ID | Nez Perce County | 2 | Small-in a metro area with fewer than 1 million residents | 37,410 | | 16071 | ID | Oneida County | 7 | Noncore adjacent to a small metro and does not contain a town of at least 2,500 residents | 4,125 | | 16073 | ID | Owyhee County | 2 | Small-in a metro area with fewer than 1 million residents | 10,644 | | 16075 | ID | Payette County | 5 | Micropolitan adjacent to a small metro area | 20,578 | | 16077 | ID | Power County | 2 | Small-in a metro area with fewer than 1 million residents | 7,538 | | 16079 | ID | Shoshone County | 7 | Noncore adjacent to a small metro and does not contain a town of at least 2,500 residents | 13,771 | | 16081 | ID | Teton County | 8 | Micropolitan not adjacent to a metro area | 5,999 | | 16083 | ID | Twin Falls County | 8 | Micropolitan not adjacent to a metro area | 64,284 | | 16085 | ID | Valley County | 7 | Noncore adjacent to a small metro and does not contain a town of at least 2,500 residents | 7,651 | | 16087 | ID | Washington County | 6 | Noncore adjacent to a small metro with town of at least 2,500 residents | 9,977 |
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