Last official estimated population of Sheridan County was 29,148 (year 2014)[1]. This was 0.009% of total US population and 5% of total Wyoming state population. Area of Sheridan County is 2,526.5 mi² (=6543.5 km²), in this year population density was 11.54 p/mi². If population growth rate would be same as in period 2010-2014 (+0.03%/yr), Sheridan County population in 2026 would be 29,244 [0].
Historical population of Sheridan County for period 1890-2014 [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
[1890-1900] +10.02 %/yr
[1900-1910] +12.29 %/yr
[1910-1920] +1.08 %/yr
[1920-1930] -0.74 %/yr
[1930-1940] +1.33 %/yr
[1940-1950] +0.47 %/yr
[1950-1960] -0.61 %/yr
[1960-1970] -0.62 %/yr
[1970-1980] +3.44 %/yr
[1980-1990] -0.61 %/yr
[1990-2000] +1.21 %/yr
[2000-2005] +0.38 %/yr
[2005-2010] +1.46 %/yr
[2010-2014] +0.03 %/yr
Looking for settlements in Sheridan County? Visit this page: Settlements in Sheridan County, WY
Population of Sheridan County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 860 | 836 | 1,696 |
| 5 to 9 | 931 | 899 | 1,830 |
| 10 to 14 | 914 | 885 | 1,799 |
| 15 to 19 | 963 | 908 | 1,871 |
| 20 to 24 | 883 | 824 | 1,707 |
| 25 to 29 | 847 | 835 | 1,682 |
| 30 to 34 | 905 | 894 | 1,799 |
| 35 to 39 | 884 | 926 | 1,810 |
| 40 to 44 | 890 | 829 | 1,719 |
| 45 to 49 | 848 | 833 | 1,681 |
| 50 to 54 | 1028 | 1106 | 2,134 |
| 55 to 59 | 1185 | 1214 | 2,399 |
| 60 to 64 | 1221 | 1192 | 2,413 |
| 65 to 69 | 988 | 904 | 1,892 |
| 70 to 74 | 657 | 677 | 1,334 |
| 75 to 79 | 457 | 436 | 893 |
| 80 to 84 | 295 | 368 | 663 |
| 85+ | 248 | 462 | 710 |
Sheridan 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 | 14469 | 14544 | 29,013 |
| NH | 14337 | 14428 | 28,765 |
| WA | 14258 | 14343 | 28,601 |
| NHWAC | 13866 | 14011 | 27,877 |
| NHWA | 13674 | 13827 | 27,501 |
| H | 667 | 600 | 1,267 |
| HWAC | 603 | 533 | 1,136 |
| HWA | 584 | 516 | 1,100 |
| IAC | 372 | 303 | 675 |
| NHIAC | 316 | 250 | 566 |
| TOM | 222 | 210 | 432 |
| IA | 234 | 181 | 415 |
| NHTOM | 200 | 190 | 390 |
| AAC | 148 | 227 | 375 |
| BAC | 222 | 146 | 368 |
| NHAAC | 142 | 225 | 367 |
| NHIA | 194 | 145 | 339 |
| NHBAC | 199 | 124 | 323 |
| BA | 185 | 110 | 295 |
| AA | 94 | 170 | 264 |
| NHAA | 93 | 169 | 262 |
| NHBA | 167 | 92 | 259 |
| HIAC | 56 | 53 | 109 |
| HIA | 40 | 36 | 76 |
| NAC | 27 | 33 | 60 |
| HBAC | 23 | 22 | 45 |
| NHNAC | 22 | 22 | 44 |
| HTOM | 22 | 20 | 42 |
| HBA | 18 | 18 | 36 |
| NA | 11 | 14 | 25 |
| HNAC | 5 | 11 | 16 |
| NHNA | 9 | 5 | 14 |
| HNA | 2 | 9 | 11 |
| HAAC | 6 | 2 | 8 |
| HAA | 1 | 1 | 2 |
• Yellowstone County population
104.7 mi, 
319°
• Campbell County
78.6 mi, 
121°
• Big Horn County
53.3 mi, 324°
• Big Horn County
57.5 mi, 
252°
• Rosebud County
96.7 mi, 
6°
• Johnson County
52.9 mi, 
164°
• Washakie County
73.5 mi, 
211°
• Hot Springs County
106.2 mi, 
226°
• Powder River County
77.9 mi, 
56°
• Treasure County
100.5 mi, 
348°
[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
*Johnson Wyoming Notes
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