Last official estimated population of Boise County was 7,019 (year 2014)[1]. This was 0.002% of total US population and 0.4% of total Idaho state population. Area of Boise County is 1,906.7 mi² (=4938.3 km²), in this year population density was 3.68 p/mi². If population growth rate would be same as in period 2010-2014 (-0.03%/yr), Boise County population in 2026 would be 6,992 [0].
Historical population of Boise 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] -1.75 %/yr
[1880-1890] +0.39 %/yr
[1890-1900] +2.25 %/yr
[1900-1910] +2.32 %/yr
[1910-1920] -10.04 %/yr
[1920-1930] +0.14 %/yr
[1930-1940] +2.36 %/yr
[1940-1950] -2.69 %/yr
[1950-1960] -0.76 %/yr
[1960-1970] +0.69 %/yr
[1970-1980] +5.46 %/yr
[1980-1990] +1.58 %/yr
[1990-2000] +6.59 %/yr
[2000-2005] +0.99 %/yr
[2005-2010] +0.13 %/yr
[2010-2014] -0.03 %/yr
Looking for settlements in Boise County? Visit this page: Settlements in Boise County, ID
Population of Boise County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 125 | 93 | 218 |
| 5 to 9 | 172 | 147 | 319 |
| 10 to 14 | 213 | 208 | 421 |
| 15 to 19 | 225 | 212 | 437 |
| 20 to 24 | 115 | 129 | 244 |
| 25 to 29 | 122 | 96 | 218 |
| 30 to 34 | 112 | 132 | 244 |
| 35 to 39 | 156 | 142 | 298 |
| 40 to 44 | 181 | 203 | 384 |
| 45 to 49 | 211 | 220 | 431 |
| 50 to 54 | 321 | 311 | 632 |
| 55 to 59 | 354 | 378 | 732 |
| 60 to 64 | 406 | 389 | 795 |
| 65 to 69 | 337 | 273 | 610 |
| 70 to 74 | 262 | 187 | 449 |
| 75 to 79 | 117 | 74 | 191 |
| 80 to 84 | 60 | 48 | 108 |
| 85+ | 34 | 59 | 93 |
Boise 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 | 3449 | 3191 | 6,640 |
| NH | 3410 | 3169 | 6,579 |
| WA | 3390 | 3112 | 6,502 |
| NHWAC | 3346 | 3076 | 6,422 |
| NHWA | 3295 | 3004 | 6,299 |
| H | 113 | 132 | 245 |
| HWAC | 103 | 115 | 218 |
| HWA | 95 | 108 | 203 |
| IAC | 69 | 97 | 166 |
| TOM | 63 | 81 | 144 |
| NHIAC | 57 | 78 | 135 |
| NHTOM | 55 | 74 | 129 |
| IA | 36 | 50 | 86 |
| AAC | 35 | 30 | 65 |
| NHIA | 28 | 37 | 65 |
| BAC | 28 | 36 | 64 |
| NHAAC | 34 | 29 | 63 |
| NHBAC | 23 | 32 | 55 |
| NHAA | 18 | 17 | 35 |
| AA | 18 | 17 | 35 |
| NHNAC | 5 | 29 | 34 |
| NAC | 5 | 29 | 34 |
| BA | 15 | 16 | 31 |
| HIAC | 12 | 19 | 31 |
| NA | 1 | 25 | 26 |
| NHNA | 1 | 25 | 26 |
| NHBA | 13 | 12 | 25 |
| HIA | 8 | 13 | 21 |
| HTOM | 8 | 7 | 15 |
| HBAC | 5 | 4 | 9 |
| HBA | 2 | 4 | 6 |
| HAAC | 1 | 1 | 2 |
| HNAC | 0 | 0 | 0 |
| HAA | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
• Ada County population
45.5 mi, 
215°
• Canyon County
55.6 mi, 
243°
• Elmore County
42.7 mi, 
163°
• Payette County
51.5 mi, 
271°
• Gem County
34.3 mi, 
278°
• Washington County
62.4 mi, 
300°
• Valley County
54.3 mi, 
4°
• Custer County
75.2 mi, 
74°
• Adams County
71.7 mi, 
329°
• Camas County
58.1 mi, 
128°
[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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