Census Charts Index > Idaho

Idaho Census Data: Age & Sex by County

Age and sex distributions for Idaho counties are shown in this easy-to-read table and chart combination.

Scroll down for information about Reading the chart.

Source: U.S. Census Bureau 2000 Census.


Idaho Census Data: Age & Sex by County
LocationPopulationAge %Median
Age
Males per 100 FemalesLocation
under 1818-2425-4445-6465 & overAll Ages18 & Over
United States

281,421,906

25.79.630.222.012.4

35.3

96.393.4United States
Idaho

1,293,953

28.510.728.021.511.3

33.2

100.598.5Idaho
Ada Co.300,90427.310.332.520.89.1

32.8

100.698.9Ada Co.
Adams Co.3,47623.94.622.632.716.1

44.4

105.4102.1Adams Co.
Bannock Co.75,56528.114.627.220.010.1

29.8

97.794.4Bannock Co.
Bear Lake Co.6,41133.07.422.421.715.6

35.8

98.496.7Bear Lake Co.
Benewah Co.9,17126.96.825.426.614.2

39.2

104.0101.1Benewah Co.
Bingham Co.41,73534.99.725.319.710.3

29.7

100.097.9Bingham Co.
Blaine Co.18,99124.07.732.627.97.8

37.4

107.9106.8Blaine Co.
Boise Co.6,67026.94.727.130.311.0

40.4

105.4106.3Boise Co.
Bonner Co.36,83525.56.725.429.313.1

40.8

100.398.2Bonner Co.
Bonneville Co.82,52232.19.527.221.010.2

31.8

99.496.2Bonneville Co.
Boundary Co.9,87129.26.924.426.213.4

38.3

101.4100.6Boundary Co.
Butte Co.2,89929.06.324.025.714.9

38.8

101.299.3Butte Co.
Camas Co.99124.76.628.227.513.0

39.7

104.8102.2Camas Co.
Canyon Co.131,44130.910.728.319.111.0

30.5

98.796.3Canyon Co.
Caribou Co.7,30431.78.224.522.013.6

35.0

99.298.6Caribou Co.
Cassia Co.21,41634.19.024.519.612.7

31.1

101.298.7Cassia Co.
Clark Co.1,02235.28.027.520.19.2

30.7

110.7112.2Clark Co.
Clearwater Co.8,93023.05.926.329.215.6

41.7

113.4115.9Clearwater Co.
Custer Co.4,34225.54.825.929.314.5

41.2

104.5106.8Custer Co.
Elmore Co.29,13028.013.936.015.07.1

29.1

123.2130.6Elmore Co.
Franklin Co.11,32937.39.324.217.511.7

27.7

99.498.3Franklin Co.
Fremont Co.11,81933.19.324.720.412.4

31.9

105.8105.8Fremont Co.
Gem Co.15,18128.07.625.323.515.6

37.5

98.796.7Gem Co.
Gooding Co.14,15529.68.725.121.215.4

35.1

104.2102.0Gooding Co.
Idaho Co.15,51125.06.323.328.417.0

42.3

103.6104.9Idaho Co.
Jefferson Co.19,15536.39.625.519.39.3

28.8

102.2101.0Jefferson Co.
Jerome Co.18,34231.58.927.120.212.3

32.9

104.6104.5Jerome Co.
Kootenai Co.108,68527.18.728.023.912.3

36.1

98.194.9Kootenai Co.
Latah Co.34,93520.324.526.918.99.5

27.9

107.5108.1Latah Co.
Lemhi Co.7,80625.55.522.729.516.8

42.7

99.297.5Lemhi Co.
LocationPopulationAge %Median
Age
Males per 100 FemalesLocation
under 1818-2425-4445-6465 & overAll Ages18 & Over
United States

281,421,906

25.79.630.222.012.4

35.3

96.393.4United States
Idaho

1,293,953

28.510.728.021.511.3

33.2

100.598.5Idaho
Lewis Co.3,74725.45.323.827.118.5

42.5

101.998.2Lewis Co.
Lincoln Co.4,04430.49.025.522.013.1

34.3

106.5105.8Lincoln Co.
Madison Co.27,46726.239.916.011.96.0

20.7

90.983.6Madison Co.
Minidoka Co.20,17431.69.125.220.913.2

33.5

99.997.8Minidoka Co.
Nez Perce Co.37,41023.810.026.723.016.5

38.1

96.793.8Nez Perce Co.
Oneida Co.4,12532.07.723.121.415.9

36.0

103.1100.4Oneida Co.
Owyhee Co.10,64431.98.526.520.912.1

32.9

109.0107.6Owyhee Co.
Payette Co.20,57830.67.926.621.713.2

34.4

98.394.8Payette Co.
Power Co.7,53833.88.425.422.010.4

31.6

101.099.9Power Co.
Shoshone Co.13,77122.96.725.527.417.4

41.8

99.497.0Shoshone Co.
Teton Co.5,99931.88.133.818.97.5

31.3

112.7114.5Teton Co.
Twin Falls Co.64,28427.910.426.021.514.3

34.9

96.593.7Twin Falls Co.
Valley Co.7,65123.74.424.932.214.8

43.5

105.9104.4Valley Co.
Washington Co.9,97727.47.223.424.317.7

39.2

95.893.0Washington Co.

Reading the Chart:

The entries under the Age % heading are percentages showing the age distribution. For example, the entry in the first row (United States) in the under 18 column is 25.7, meaning that 25.7% of the U.S. population is under 18 years of age. The Age% values add up to approximately 100%.

The length of the colored bars in each Age % table cell are in proportion to the value of the number in the cell. For example, the colored bar in the cell showing 25.7 is 25.7% as wide as the cell.

The length of the colored bars under the Males per 100 Females header are proportional to the value when converted to percentages. For example, 110 males per 100 females = 110 males per 210 people = 52.4%.

The numeric values under the Population header are totals. Here the colored bars represent percentages of the highest population of any county in the state. For example, the county with the highest population will have a colored bar that fills the cell. A county with half that many people will have a colored bar that fills half the cell. For small percentages the bar does not appear.

Abbreviations used in location names: Co.=County, C.A.=Census Area, Pa.=Parish, Mu.=Municipio.

Interested in Idaho? Check out Idaho Climate for data and charts about average weather, daylight, and global warming.

Please note that if you set your browser to display very large text sizes, the table cell sizes will change, and the lengths of the colored bars will not be accurate, although they will still show proportions.

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