Last official estimated population of Johnson County was 8,568 (year 2014)[1]. This was 0.003% of total US population and 1.5% of total Wyoming state population. Area of Johnson County is 4,174.6 mi² (=10812.2 km²), in this year population density was 2.05 p/mi². If population growth rate would be same as in period 2010-2014 (-0%/yr), Johnson County population in 2026 would be 8,565 [0].
Historical population of Johnson County for period 1880-2014 [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
[1880-1890] +13.98 %/yr
[1890-1900] +0.02 %/yr
[1900-1910] +3.87 %/yr
[1910-1920] +2.95 %/yr
[1920-1930] +0.42 %/yr
[1930-1940] +0.34 %/yr
[1940-1950] -0.56 %/yr
[1950-1960] +1.52 %/yr
[1960-1970] +0.2 %/yr
[1970-1980] +1.83 %/yr
[1980-1990] -0.86 %/yr
[1990-2000] +1.43 %/yr
[2000-2005] +1.64 %/yr
[2005-2010] +2.2 %/yr
[2010-2014] -0 %/yr
Looking for settlements in Johnson County? Visit this page: Settlements in Johnson County, WY
Population of Johnson County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 264 | 230 | 494 |
| 5 to 9 | 320 | 270 | 590 |
| 10 to 14 | 245 | 234 | 479 |
| 15 to 19 | 264 | 250 | 514 |
| 20 to 24 | 195 | 191 | 386 |
| 25 to 29 | 207 | 213 | 420 |
| 30 to 34 | 259 | 270 | 529 |
| 35 to 39 | 229 | 219 | 448 |
| 40 to 44 | 254 | 237 | 491 |
| 45 to 49 | 202 | 243 | 445 |
| 50 to 54 | 310 | 310 | 620 |
| 55 to 59 | 346 | 342 | 688 |
| 60 to 64 | 362 | 338 | 700 |
| 65 to 69 | 307 | 276 | 583 |
| 70 to 74 | 232 | 216 | 448 |
| 75 to 79 | 158 | 148 | 306 |
| 80 to 84 | 93 | 118 | 211 |
| 85+ | 92 | 129 | 221 |
Johnson 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 | 4231 | 4070 | 8,301 |
| WA | 4169 | 4008 | 8,177 |
| NH | 4116 | 4047 | 8,163 |
| NHWAC | 4024 | 3907 | 7,931 |
| NHWA | 3970 | 3855 | 7,825 |
| H | 223 | 187 | 410 |
| HWAC | 207 | 163 | 370 |
| HWA | 199 | 153 | 352 |
| IAC | 88 | 99 | 187 |
| NHIAC | 67 | 76 | 143 |
| TOM | 63 | 62 | 125 |
| IA | 49 | 65 | 114 |
| NHTOM | 55 | 52 | 107 |
| BAC | 40 | 64 | 104 |
| AAC | 41 | 60 | 101 |
| NHBAC | 39 | 57 | 96 |
| NHAAC | 39 | 56 | 95 |
| AA | 31 | 54 | 85 |
| NHIA | 36 | 47 | 83 |
| NHAA | 29 | 52 | 81 |
| BA | 27 | 42 | 69 |
| NHBA | 26 | 38 | 64 |
| HIAC | 21 | 23 | 44 |
| HIA | 13 | 18 | 31 |
| HTOM | 8 | 10 | 18 |
| NHNAC | 3 | 5 | 8 |
| NAC | 3 | 5 | 8 |
| HBAC | 1 | 7 | 8 |
| HAAC | 2 | 4 | 6 |
| HBA | 1 | 4 | 5 |
| HAA | 2 | 2 | 4 |
| NHNA | 0 | 3 | 3 |
| NA | 0 | 3 | 3 |
| HNAC | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
• Natrona County population
74.5 mi, 
186°
• Campbell County
54.1 mi, 
79°
• Sheridan County
52.9 mi, 
344°
• Converse County
91.6 mi, 
143°
• Big Horn County
104.7 mi, 
334°
• Big Horn County
77.1 mi, 
295°
• Washakie County
54.9 mi, 
258°
• Weston County
101.3 mi, 
97°
• Crook County
106.8 mi, 
69°
• Hot Springs County
94.6 mi, 256°
[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
*Carbon, Sweetwater; Albany Wyoming Notes
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