Last official estimated population of Republic County was 4,957 (year 2014)[1]. This was 0.002% of total US population and 0.2% of total Kansas state population. Area of Republic County is 720.4 mi² (=1866 km²), in this year population density was 6.88 p/mi². If population growth rate would be same as in period 2010-2014 (-0.12%/yr), Republic County population in 2025 would be 4,894 [0].
Historical population of Republic 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] +27.82 %/yr
[1880-1890] +2.45 %/yr
[1890-1900] -0.4 %/yr
[1900-1910] -0.45 %/yr
[1910-1920] -0.95 %/yr
[1920-1930] -0.72 %/yr
[1930-1940] -1.16 %/yr
[1940-1950] -1.33 %/yr
[1950-1960] -1.6 %/yr
[1960-1970] -1.38 %/yr
[1970-1980] -1.15 %/yr
[1980-1990] -1.54 %/yr
[1990-2000] -1.05 %/yr
[2000-2005] -2.12 %/yr
[2005-2010] -1.01 %/yr
[2010-2014] -0.12 %/yr
Looking for settlements in Republic County? Visit this page: Settlements in Republic County, KS
Population of Republic County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 126 | 136 | 262 |
| 5 to 9 | 113 | 136 | 249 |
| 10 to 14 | 124 | 125 | 249 |
| 15 to 19 | 133 | 123 | 256 |
| 20 to 24 | 111 | 96 | 207 |
| 25 to 29 | 94 | 97 | 191 |
| 30 to 34 | 150 | 106 | 256 |
| 35 to 39 | 79 | 90 | 169 |
| 40 to 44 | 98 | 111 | 209 |
| 45 to 49 | 128 | 128 | 256 |
| 50 to 54 | 184 | 188 | 372 |
| 55 to 59 | 227 | 193 | 420 |
| 60 to 64 | 203 | 189 | 392 |
| 65 to 69 | 164 | 161 | 325 |
| 70 to 74 | 135 | 128 | 263 |
| 75 to 79 | 103 | 141 | 244 |
| 80 to 84 | 83 | 135 | 218 |
| 85+ | 97 | 168 | 265 |
Republic 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 | 2317 | 2414 | 4,731 |
| WAC | 2315 | 2413 | 4,728 |
| WA | 2296 | 2385 | 4,681 |
| NHWAC | 2284 | 2380 | 4,664 |
| NHWA | 2270 | 2360 | 4,630 |
| H | 35 | 37 | 72 |
| HWAC | 31 | 33 | 64 |
| HWA | 26 | 25 | 51 |
| BAC | 24 | 26 | 50 |
| TOM | 20 | 28 | 48 |
| NHBAC | 20 | 17 | 37 |
| AAC | 12 | 25 | 37 |
| IAC | 21 | 14 | 35 |
| NHTOM | 15 | 20 | 35 |
| NHAAC | 11 | 24 | 35 |
| BA | 18 | 14 | 32 |
| NHIAC | 18 | 12 | 30 |
| AA | 10 | 18 | 28 |
| NHAA | 10 | 18 | 28 |
| NHBA | 14 | 10 | 24 |
| HTOM | 5 | 8 | 13 |
| HBAC | 4 | 9 | 13 |
| IA | 8 | 4 | 12 |
| NHIA | 8 | 4 | 12 |
| HBA | 4 | 4 | 8 |
| HIAC | 3 | 2 | 5 |
| NAC | 2 | 2 | 4 |
| NHNAC | 1 | 2 | 3 |
| HAAC | 1 | 1 | 2 |
| NA | 0 | 2 | 2 |
| NHNA | 0 | 2 | 2 |
| HNAC | 1 | 0 | 1 |
| HIA | 0 | 0 | 0 |
| HAA | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
• Cloud County population
23.6 mi,
178°
• Clay County
42.2 mi,
142°
• Jefferson County
36 mi,
48°
• Mitchell County
42.2 mi,
224°
• Ottawa County
47.7 mi,
180°
• Fillmore County
48.2 mi,
3°
• Washington County
29.7 mi,
96°
• Thayer County
24 mi,
6°
• Nuckolls County
31.9 mi,
318°
• Jewell County
30.6 mi,
263°
[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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