Last official estimated population of Sweetwater County was 43,599 (year 2014)[1]. This was 0.014% of total US population and 7.4% of total Wyoming state population. Area of Sweetwater County is 10,491.1 mi² (=27172 km²), in this year population density was 4.16 p/mi². If population growth rate would be same as in period 2010-2014 (-0.12%/yr), Sweetwater County population in 2026 would be 42,984 [0].
Historical population of Sweetwater 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] +2.94 %/yr
[1880-1890] +6.79 %/yr
[1890-1900] +5.52 %/yr
[1900-1910] +3.19 %/yr
[1910-1920] +1.66 %/yr
[1920-1930] +2.91 %/yr
[1930-1940] +0.66 %/yr
[1940-1950] +1.27 %/yr
[1950-1960] -2.04 %/yr
[1960-1970] +0.26 %/yr
[1970-1980] +8.54 %/yr
[1980-1990] -0.72 %/yr
[1990-2000] -0.31 %/yr
[2000-2005] +0.59 %/yr
[2005-2010] +2.49 %/yr
[2010-2014] -0.12 %/yr
Looking for settlements in Sweetwater County? Visit this page: Settlements in Sweetwater County, WY
Population of Sweetwater County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1705 | 1580 | 3,285 |
| 5 to 9 | 1886 | 1836 | 3,722 |
| 10 to 14 | 1668 | 1598 | 3,266 |
| 15 to 19 | 1598 | 1440 | 3,038 |
| 20 to 24 | 1557 | 1376 | 2,933 |
| 25 to 29 | 1765 | 1643 | 3,408 |
| 30 to 34 | 1966 | 1748 | 3,714 |
| 35 to 39 | 1650 | 1532 | 3,182 |
| 40 to 44 | 1449 | 1313 | 2,762 |
| 45 to 49 | 1301 | 1193 | 2,494 |
| 50 to 54 | 1611 | 1447 | 3,058 |
| 55 to 59 | 1731 | 1554 | 3,285 |
| 60 to 64 | 1361 | 1227 | 2,588 |
| 65 to 69 | 893 | 807 | 1,700 |
| 70 to 74 | 519 | 507 | 1,026 |
| 75 to 79 | 329 | 316 | 645 |
| 80 to 84 | 203 | 231 | 434 |
| 85+ | 164 | 306 | 470 |
Sweetwater 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 | 22426 | 20825 | 43,251 |
| WA | 22017 | 20444 | 42,461 |
| NH | 19508 | 18382 | 37,890 |
| NHWAC | 18821 | 17705 | 36,526 |
| NHWA | 18494 | 17387 | 35,881 |
| H | 3848 | 3272 | 7,120 |
| HWAC | 3605 | 3120 | 6,725 |
| HWA | 3523 | 3057 | 6,580 |
| IAC | 513 | 450 | 963 |
| BAC | 518 | 412 | 930 |
| TOM | 427 | 397 | 824 |
| NHBAC | 413 | 360 | 773 |
| BA | 386 | 292 | 678 |
| NHTOM | 338 | 330 | 668 |
| NHIAC | 348 | 316 | 664 |
| AAC | 280 | 324 | 604 |
| NHBA | 311 | 260 | 571 |
| IA | 301 | 262 | 563 |
| NHAAC | 235 | 293 | 528 |
| AA | 178 | 226 | 404 |
| NHIA | 189 | 173 | 362 |
| NHAA | 146 | 205 | 351 |
| HIAC | 165 | 134 | 299 |
| HIA | 112 | 89 | 201 |
| HBAC | 105 | 52 | 157 |
| HTOM | 89 | 67 | 156 |
| NAC | 80 | 61 | 141 |
| HBA | 75 | 32 | 107 |
| NHNAC | 53 | 51 | 104 |
| NA | 47 | 33 | 80 |
| HAAC | 45 | 31 | 76 |
| NHNA | 30 | 27 | 57 |
| HAA | 32 | 21 | 53 |
| HNAC | 27 | 10 | 37 |
| HNA | 17 | 6 | 23 |
• Fremont County population
97.3 mi,
8°
• Summit County
121.6 mi,
243°
• Uintah County
111.2 mi,
197°
• Uinta County
90.9 mi,
253°
• Lincoln County
100.9 mi,
292°
• Carbon County
100.3 mi,
88°
• Moffat County
80 mi,
154°
• Sublette County
93.2 mi,
325°
• Rio Blanco County
121.8 mi,
163°
• Daggett County
62.5 mi,
211°
[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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