Last official estimated population of Grant County was 89,592 (year 2014)[1]. This was 0.028% of total US population and 1.2% of total Washington state population. Area of Grant County is 2,791.3 mi² (=7229.4 km²), in this year population density was 32.10 p/mi². If population growth rate would be same as in period 2010-2014 (+0.13%/yr), Grant County population in 2025 would be 90,903 [0].
Historical population of Grant County for period 1910-2014 [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
[1910-1920] -1.12 %/yr
[1920-1930] -3.11 %/yr
[1930-1940] +9.98 %/yr
[1940-1950] +5.2 %/yr
[1950-1960] +6.68 %/yr
[1960-1970] -1.04 %/yr
[1970-1980] +1.48 %/yr
[1980-1990] +1.22 %/yr
[1990-2000] +3.15 %/yr
[2000-2005] +1.26 %/yr
[2005-2010] +2.3 %/yr
[2010-2014] +0.13 %/yr
Looking for settlements in Grant County? Visit this page: Settlements in Grant County, WA
Population of Grant County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 3928 | 4094 | 8,022 |
| 5 to 9 | 4120 | 4010 | 8,130 |
| 10 to 14 | 3770 | 3698 | 7,468 |
| 15 to 19 | 3640 | 3492 | 7,132 |
| 20 to 24 | 3477 | 3243 | 6,720 |
| 25 to 29 | 3325 | 2867 | 6,192 |
| 30 to 34 | 3103 | 2854 | 5,957 |
| 35 to 39 | 2810 | 2738 | 5,548 |
| 40 to 44 | 2726 | 2753 | 5,479 |
| 45 to 49 | 2629 | 2489 | 5,118 |
| 50 to 54 | 2831 | 2701 | 5,532 |
| 55 to 59 | 2750 | 2583 | 5,333 |
| 60 to 64 | 2365 | 2389 | 4,754 |
| 65 to 69 | 2004 | 2041 | 4,045 |
| 70 to 74 | 1470 | 1487 | 2,957 |
| 75 to 79 | 924 | 982 | 1,906 |
| 80 to 84 | 661 | 778 | 1,439 |
| 85+ | 530 | 885 | 1,415 |
Grant 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 | 44521 | 43651 | 88,172 |
| WA | 43566 | 42679 | 86,245 |
| NH | 27900 | 28081 | 55,981 |
| NHWAC | 26544 | 26741 | 53,285 |
| NHWA | 25842 | 26041 | 51,883 |
| H | 19163 | 18003 | 37,166 |
| HWAC | 17977 | 16910 | 34,887 |
| HWA | 17724 | 16638 | 34,362 |
| IAC | 1497 | 1569 | 3,066 |
| BAC | 1196 | 1023 | 2,219 |
| TOM | 1035 | 1058 | 2,093 |
| IA | 952 | 992 | 1,944 |
| BA | 912 | 743 | 1,655 |
| NHIAC | 744 | 825 | 1,569 |
| AAC | 770 | 785 | 1,555 |
| NHTOM | 754 | 755 | 1,509 |
| HIAC | 753 | 744 | 1,497 |
| NHAAC | 645 | 628 | 1,273 |
| NHBAC | 651 | 570 | 1,221 |
| HIA | 567 | 557 | 1,124 |
| AA | 527 | 540 | 1,067 |
| HBAC | 545 | 453 | 998 |
| NHAA | 443 | 444 | 887 |
| HBA | 472 | 377 | 849 |
| NHIA | 385 | 435 | 820 |
| NHBA | 440 | 366 | 806 |
| HTOM | 281 | 303 | 584 |
| NAC | 139 | 144 | 283 |
| HAAC | 125 | 157 | 282 |
| HAA | 84 | 96 | 180 |
| NHNAC | 85 | 83 | 168 |
| NA | 71 | 72 | 143 |
| HNAC | 54 | 61 | 115 |
| NHNA | 36 | 40 | 76 |
| HNA | 35 | 32 | 67 |
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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
*Douglas Washington Notes
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