Last official estimated population of Warren County was 41,753 (year 2014)[1]. This was 0.013% of total US population and 0.3% of total Pennsylvania state population. Area of Warren County is 898.6 mi² (=2327.3 km²), in this year population density was 46.47 p/mi². If population growth rate would be same as in period 2010-2014 (-0.04%/yr), Warren County population in 2024 would be 41,598 [0].
Historical population of Warren County for period 1800-2014 [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
[1800-1810] +13.5 %/yr
[1810-1820] +9.1 %/yr
[1820-1830] +9.04 %/yr
[1830-1840] +7.04 %/yr
[1840-1850] +3.95 %/yr
[1850-1860] +3.45 %/yr
[1860-1870] +2.22 %/yr
[1870-1880] +1.59 %/yr
[1880-1890] +3.02 %/yr
[1890-1900] +0.33 %/yr
[1900-1910] +0.16 %/yr
[1910-1920] +0.11 %/yr
[1920-1930] +0.35 %/yr
[1930-1940] +0.32 %/yr
[1940-1950] -0.02 %/yr
[1950-1960] +0.66 %/yr
[1960-1970] +0.45 %/yr
[1970-1980] -0.05 %/yr
[1980-1990] -0.52 %/yr
[1990-2000] -0.28 %/yr
[2000-2005] -0.73 %/yr
[2005-2010] -0.19 %/yr
[2010-2014] -0.04 %/yr
Looking for settlements in Warren County? Visit this page: Settlements in Warren County, PA
Population of Warren County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1047 | 950 | 1,997 |
| 5 to 9 | 1071 | 1053 | 2,124 |
| 10 to 14 | 1246 | 1135 | 2,381 |
| 15 to 19 | 1241 | 1079 | 2,320 |
| 20 to 24 | 1160 | 1031 | 2,191 |
| 25 to 29 | 1025 | 975 | 2,000 |
| 30 to 34 | 1104 | 1052 | 2,156 |
| 35 to 39 | 1026 | 977 | 2,003 |
| 40 to 44 | 1192 | 1219 | 2,411 |
| 45 to 49 | 1444 | 1371 | 2,815 |
| 50 to 54 | 1651 | 1593 | 3,244 |
| 55 to 59 | 1770 | 1753 | 3,523 |
| 60 to 64 | 1547 | 1571 | 3,118 |
| 65 to 69 | 1274 | 1327 | 2,601 |
| 70 to 74 | 1008 | 1034 | 2,042 |
| 75 to 79 | 693 | 784 | 1,477 |
| 80 to 84 | 480 | 626 | 1,106 |
| 85+ | 441 | 753 | 1,194 |
Warren 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 | 20224 | 20093 | 40,317 |
| WAC | 20120 | 20039 | 40,159 |
| WA | 19965 | 19875 | 39,840 |
| NHWAC | 19944 | 19868 | 39,812 |
| NHWA | 19796 | 19709 | 39,505 |
| H | 196 | 190 | 386 |
| BAC | 220 | 131 | 351 |
| HWAC | 176 | 171 | 347 |
| TOM | 170 | 176 | 346 |
| HWA | 169 | 166 | 335 |
| NHTOM | 163 | 170 | 333 |
| NHBAC | 206 | 117 | 323 |
| AAC | 118 | 157 | 275 |
| NHAAC | 118 | 155 | 273 |
| IAC | 120 | 123 | 243 |
| NHIAC | 110 | 115 | 225 |
| BA | 146 | 63 | 209 |
| NHBA | 137 | 52 | 189 |
| AA | 76 | 105 | 181 |
| NHAA | 76 | 104 | 180 |
| IA | 52 | 57 | 109 |
| NHIA | 44 | 52 | 96 |
| NAC | 17 | 15 | 32 |
| HBAC | 14 | 14 | 28 |
| NHNAC | 14 | 13 | 27 |
| HBA | 9 | 11 | 20 |
| NA | 11 | 7 | 18 |
| HIAC | 10 | 8 | 18 |
| NHNA | 8 | 6 | 14 |
| HIA | 8 | 5 | 13 |
| HTOM | 7 | 6 | 13 |
| HNAC | 3 | 2 | 5 |
| HNA | 3 | 1 | 4 |
| HAAC | 0 | 2 | 2 |
| HAA | 0 | 1 | 1 |
• Erie County population
44.5 mi, 
295°
• Chautauqua County
32.2 mi, 
351°
• Crawford County
42.3 mi, 
255°
• Cattaraugus County
43.1 mi, 
50°
• Venango County
38.1 mi, 
216°
• Jefferson County
51.2 mi, 
162°
• McKean County
38.2 mi, 
93°
• Clarion County
44.9 mi, 
187°
• Elk County
44.6 mi, 
130°
• Forest County
23.1 mi, 
171°
[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
See note 24 Pennsylvania Notes
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