Last official estimated population of Ada County was 393,412 (year 2014)[1]. This was 0.123% of total US population and 23.8% of total Idaho state population. Area of Ada County is 1,060.5 mi² (=2746.6 km²), in this year population density was 370.98 p/mi². If population growth rate would be same as in period 2010-2014 (+0.07%/yr), Ada County population in 2024 would be 396,042 [0].
Historical population of Ada County for period 1870-2014 [1] , [2] , [3]:
Estimated population for 2014[1]. Population density is in p./sq.mi [4]. Changes are for period 2010-2015. Value is %/year. Boundary lines are approx. 2012 [5]. Click on flag to hide it.
Population • Density • Changes • Legends • Position
[1870-1880] +5.74 %/yr
[1880-1890] +6 %/yr
[1890-1900] +3.28 %/yr
[1900-1910] +9.67 %/yr
[1910-1920] +1.93 %/yr
[1920-1930] +0.74 %/yr
[1930-1940] +2.88 %/yr
[1940-1950] +3.43 %/yr
[1950-1960] +2.84 %/yr
[1960-1970] +1.85 %/yr
[1970-1980] +4.42 %/yr
[1980-1990] +1.75 %/yr
[1990-2000] +3.87 %/yr
[2000-2005] +2.99 %/yr
[2005-2010] +2.38 %/yr
[2010-2014] +0.07 %/yr
Looking for settlements in Ada County? Visit this page: Settlements in Ada County, ID
Population of Ada County by age groups male (M) and female (F)[1b]
Age Gr. | (M) | (F) | Total |
0 to 4 | 13579 | 12944 | 26,523 |
5 to 9 | 15801 | 15137 | 30,938 |
10 to 14 | 16151 | 15537 | 31,688 |
15 to 19 | 14395 | 13637 | 28,032 |
20 to 24 | 13979 | 12792 | 26,771 |
25 to 29 | 15661 | 15204 | 30,865 |
30 to 34 | 16362 | 15269 | 31,631 |
35 to 39 | 15342 | 14575 | 29,917 |
40 to 44 | 15049 | 14477 | 29,526 |
45 to 49 | 14174 | 13705 | 27,879 |
50 to 54 | 14282 | 14249 | 28,531 |
55 to 59 | 12961 | 13882 | 26,843 |
60 to 64 | 11441 | 12095 | 23,536 |
65 to 69 | 9503 | 9897 | 19,400 |
70 to 74 | 6040 | 6887 | 12,927 |
75 to 79 | 3847 | 4624 | 8,471 |
80 to 84 | 2505 | 3513 | 6,018 |
85+ | 2436 | 4304 | 6,740 |
Ada County resident population estimates by Sex, Race, and Hispanic Origin[1b]. For full list of abbrevations see: population.us/about page.
Race | Male | Female | Total |
WAC | 202288 | 202210 | 404,498 |
WA | 196813 | 196832 | 393,645 |
NH | 196516 | 196733 | 393,249 |
NHWAC | 186536 | 187266 | 373,802 |
NHWA | 181733 | 182632 | 364,365 |
H | 16992 | 15995 | 32,987 |
HWAC | 15752 | 14944 | 30,696 |
HWA | 15080 | 14200 | 29,280 |
AAC | 8113 | 8633 | 16,746 |
NHAAC | 7720 | 8255 | 15,975 |
TOM | 5833 | 5700 | 11,533 |
AA | 5328 | 5916 | 11,244 |
NHAA | 5164 | 5768 | 10,932 |
NHTOM | 5051 | 4851 | 9,902 |
BAC | 4676 | 3608 | 8,284 |
NHBAC | 4205 | 3187 | 7,392 |
IAC | 3715 | 3466 | 7,181 |
BA | 3194 | 2197 | 5,391 |
NHBA | 2940 | 2015 | 4,955 |
NHIAC | 2556 | 2382 | 4,938 |
IA | 1837 | 1650 | 3,487 |
NHIA | 1173 | 1074 | 2,247 |
HIAC | 1159 | 1084 | 2,243 |
NAC | 1086 | 1015 | 2,101 |
NHNAC | 935 | 876 | 1,811 |
HTOM | 782 | 849 | 1,631 |
HIA | 664 | 576 | 1,240 |
NA | 503 | 433 | 936 |
HBAC | 471 | 421 | 892 |
NHNA | 455 | 393 | 848 |
HAAC | 393 | 378 | 771 |
HBA | 254 | 182 | 436 |
HAA | 164 | 148 | 312 |
HNAC | 151 | 139 | 290 |
HNA | 48 | 40 | 88 |
• Canyon County population
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70.7 mi, 255°
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39 mi, 95°
• Payette County
45.7 mi, 326°
• Gem County
42.8 mi, 349°
• Gooding County
78.9 mi, 114°
• Owyhee County
60.8 mi, 177°
• Washington County
74.2 mi, 338°
• Boise County
45.5 mi, 35°
• Camas County
72.2 mi, 89°
[0] Calculated by population.us from last known population growth rate, not official data.
[1] County population - 2014, archived from the original, retrieved 02/23/2016
[1b] Annual County Resident Population Estimates by Age, Sex, Race, and Hispanic Origin, (used only data for 2014) archived from the original, retrieved 02/23/2016
[2] County population - 2000-2010, archived from the original, retrieved 02/23/2016
[3] Population of States and Counties of the United States: 1790 to 1992, PDF, 15 Mb, census.gov, retrieved 02/23/2016
[4] County area, latitude longitude data, retrieved 02/23/2016
[5] County boundaries, CSV files on boundaries.us, retrived 03/18/2016
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