Last official estimated population of Thurston County was 253,046 (year 2014)[1]. This was 0.079% of total US population and 3.5% of total Washington state population. Area of Thurston County is 773.5 mi² (=2003.4 km²), in this year population density was 327.14 p/mi². If population growth rate would be same as in period 2010-2014 (+0.08%/yr), Thurston County population in 2025 would be 255,209 [0].
Historical population of Thurston County for period 1860-2014 [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

[1860-1870] +4.07 %/yr
[1870-1880] +3.83 %/yr
[1880-1890] +11.46 %/yr
[1890-1900] +0.26 %/yr
[1900-1910] +5.88 %/yr
[1910-1920] +2.44 %/yr
[1920-1930] +3.43 %/yr
[1930-1940] +1.75 %/yr
[1940-1950] +1.87 %/yr
[1950-1960] +2.06 %/yr
[1960-1970] +3.4 %/yr
[1970-1980] +4.92 %/yr
[1980-1990] +2.64 %/yr
[1990-2000] +2.55 %/yr
[2000-2005] +1.83 %/yr
[2005-2010] +2.13 %/yr
[2010-2014] +0.08 %/yr
Looking for settlements in Thurston County? Visit this page: Settlements in Thurston County, WA
Population of Thurston County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 8527 | 7561 | 16,088 |
| 5 to 9 | 8412 | 7890 | 16,302 |
| 10 to 14 | 8469 | 7846 | 16,315 |
| 15 to 19 | 8372 | 7745 | 16,117 |
| 20 to 24 | 9005 | 8600 | 17,605 |
| 25 to 29 | 9604 | 9248 | 18,852 |
| 30 to 34 | 9509 | 9569 | 19,078 |
| 35 to 39 | 8691 | 8696 | 17,387 |
| 40 to 44 | 8324 | 8481 | 16,805 |
| 45 to 49 | 8179 | 8431 | 16,610 |
| 50 to 54 | 8614 | 9420 | 18,034 |
| 55 to 59 | 8653 | 9744 | 18,397 |
| 60 to 64 | 8192 | 9653 | 17,845 |
| 65 to 69 | 6886 | 7636 | 14,522 |
| 70 to 74 | 4610 | 5257 | 9,867 |
| 75 to 79 | 2952 | 3449 | 6,401 |
| 80 to 84 | 1998 | 2619 | 4,617 |
| 85+ | 1642 | 3367 | 5,009 |
Thurston 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 |
| NH | 119080 | 124479 | 243,559 |
| WAC | 114752 | 118512 | 233,264 |
| WA | 108447 | 112023 | 220,470 |
| NHWAC | 104753 | 109159 | 213,912 |
| NHWA | 99318 | 103596 | 202,914 |
| H | 11559 | 10733 | 22,292 |
| AAC | 9669 | 11667 | 21,336 |
| NHAAC | 9115 | 11094 | 20,209 |
| HWAC | 9999 | 9353 | 19,352 |
| HWA | 9129 | 8427 | 17,556 |
| AA | 6653 | 8600 | 15,253 |
| NHAA | 6399 | 8358 | 14,757 |
| TOM | 6841 | 7015 | 13,856 |
| BAC | 7229 | 6127 | 13,356 |
| NHTOM | 5889 | 6013 | 11,902 |
| NHBAC | 6452 | 5398 | 11,850 |
| IAC | 4576 | 4725 | 9,301 |
| BA | 5063 | 3988 | 9,051 |
| NHBA | 4575 | 3580 | 8,155 |
| NHIAC | 3471 | 3659 | 7,130 |
| IA | 2328 | 2281 | 4,609 |
| NAC | 2143 | 2178 | 4,321 |
| NHNAC | 1884 | 1947 | 3,831 |
| NHIA | 1732 | 1743 | 3,475 |
| NA | 1307 | 1305 | 2,612 |
| NHNA | 1167 | 1189 | 2,356 |
| HIAC | 1105 | 1066 | 2,171 |
| HTOM | 952 | 1002 | 1,954 |
| HBAC | 777 | 729 | 1,506 |
| HIA | 596 | 538 | 1,134 |
| HAAC | 554 | 573 | 1,127 |
| HBA | 488 | 408 | 896 |
| HAA | 254 | 242 | 496 |
| HNAC | 259 | 231 | 490 |
| HNA | 140 | 116 | 256 |
• King County population
60.5 mi,
50°
• Pierce County
32.9 mi,
75°
• Kitsap County
49.4 mi,
9°
• Cowlitz County
52.4 mi,
171°
• Lewis County
32.6 mi,
138°
• Grays Harbor County
48.5 mi,
284°
• Mason County
33.1 mi,
330°
• Jefferson County
68.4 mi,
331°
• Pacific County
52.1 mi,
239°
• Wahkiakum County
52.5 mi,
212°
[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
*Lewis; Clark Washington Notes
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