Last official estimated population of Boundary County was 11,015 (year 2014)[1]. This was 0.003% of total US population and 0.7% of total Idaho state population. Area of Boundary County is 1,278.0 mi² (=3309.9 km²), in this year population density was 8.62 p/mi². If population growth rate would be same as in period 2010-2014 (+0.1%/yr), Boundary County population in 2024 would be 11,123 [0].
Historical population of Boundary County for period 1920-2014 [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
[1920-1930] +0.18 %/yr
[1930-1940] +2.77 %/yr
[1940-1950] -0.13 %/yr
[1950-1960] -0.17 %/yr
[1960-1970] +0.93 %/yr
[1970-1980] +1.36 %/yr
[1980-1990] +1.35 %/yr
[1990-2000] +1.72 %/yr
[2000-2005] +0.84 %/yr
[2005-2010] +1.27 %/yr
[2010-2014] +0.1 %/yr
Looking for settlements in Boundary County? Visit this page: Settlements in Boundary County, ID
Population of Boundary County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 309 | 251 | 560 |
| 5 to 9 | 341 | 314 | 655 |
| 10 to 14 | 399 | 393 | 792 |
| 15 to 19 | 414 | 372 | 786 |
| 20 to 24 | 269 | 217 | 486 |
| 25 to 29 | 232 | 217 | 449 |
| 30 to 34 | 275 | 298 | 573 |
| 35 to 39 | 315 | 283 | 598 |
| 40 to 44 | 299 | 313 | 612 |
| 45 to 49 | 332 | 299 | 631 |
| 50 to 54 | 378 | 396 | 774 |
| 55 to 59 | 398 | 464 | 862 |
| 60 to 64 | 463 | 487 | 950 |
| 65 to 69 | 419 | 403 | 822 |
| 70 to 74 | 309 | 278 | 587 |
| 75 to 79 | 217 | 148 | 365 |
| 80 to 84 | 120 | 135 | 255 |
| 85+ | 69 | 153 | 222 |
Boundary 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 | 5379 | 5209 | 10,588 |
| NH | 5326 | 5193 | 10,519 |
| WA | 5279 | 5097 | 10,376 |
| NHWAC | 5171 | 5004 | 10,175 |
| NHWA | 5079 | 4909 | 9,988 |
| H | 232 | 228 | 460 |
| HWAC | 208 | 205 | 413 |
| HWA | 200 | 188 | 388 |
| IAC | 175 | 194 | 369 |
| NHIAC | 150 | 163 | 313 |
| IA | 119 | 125 | 244 |
| TOM | 107 | 116 | 223 |
| NHIA | 100 | 106 | 206 |
| NHTOM | 99 | 99 | 198 |
| AAC | 55 | 67 | 122 |
| NHAAC | 50 | 62 | 112 |
| BAC | 45 | 61 | 106 |
| NHBAC | 44 | 59 | 103 |
| AA | 26 | 48 | 74 |
| NHAA | 21 | 44 | 65 |
| HIAC | 25 | 31 | 56 |
| NHBA | 25 | 29 | 54 |
| BA | 25 | 29 | 54 |
| HIA | 19 | 19 | 38 |
| NAC | 14 | 14 | 28 |
| NHNAC | 13 | 12 | 25 |
| HTOM | 8 | 17 | 25 |
| HAAC | 5 | 5 | 10 |
| HAA | 5 | 4 | 9 |
| NA | 2 | 6 | 8 |
| NHNA | 2 | 6 | 8 |
| HNAC | 1 | 2 | 3 |
| HBAC | 1 | 2 | 3 |
| HBA | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
• Spokane County population
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• Benewah County
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• Ferry County
94.1 mi, 
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[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
*Bonner Idaho Notes
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