Last official estimated population of Dauphin County was 268,281 (year 2014)[1]. This was 0.084% of total US population and 2.1% of total Pennsylvania state population. Area of Dauphin County is 558.2 mi² (=1445.7 km²), in this year population density was 480.64 p/mi². If population growth rate would be same as in period 2010-2014 (+0.02%/yr), Dauphin County population in 2026 would be 268,825 [0].
Historical population of Dauphin County for period 1790-2014 [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
[1790-1800] +2.05 %/yr
[1800-1810] +3.65 %/yr
[1810-1820] -3.8 %/yr
[1820-1830] +1.55 %/yr
[1830-1840] +1.78 %/yr
[1840-1850] +1.73 %/yr
[1850-1860] +2.72 %/yr
[1860-1870] +2.65 %/yr
[1870-1880] +2.29 %/yr
[1880-1890] +2.45 %/yr
[1890-1900] +1.67 %/yr
[1900-1910] +1.75 %/yr
[1910-1920] +1.18 %/yr
[1920-1930] +0.76 %/yr
[1930-1940] +0.71 %/yr
[1940-1950] +1.09 %/yr
[1950-1960] +1.08 %/yr
[1960-1970] +0.16 %/yr
[1970-1980] +0.37 %/yr
[1980-1990] +0.23 %/yr
[1990-2000] +0.57 %/yr
[2000-2005] +0.46 %/yr
[2005-2010] +0.8 %/yr
[2010-2014] +0.02 %/yr
Looking for settlements in Dauphin County? Visit this page: Settlements in Dauphin County, PA
Population of Dauphin County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 8517 | 8289 | 16,806 |
| 5 to 9 | 8506 | 8183 | 16,689 |
| 10 to 14 | 8627 | 8346 | 16,973 |
| 15 to 19 | 8550 | 7972 | 16,522 |
| 20 to 24 | 8347 | 8513 | 16,860 |
| 25 to 29 | 9210 | 9456 | 18,666 |
| 30 to 34 | 8977 | 9184 | 18,161 |
| 35 to 39 | 7677 | 8005 | 15,682 |
| 40 to 44 | 8521 | 8588 | 17,109 |
| 45 to 49 | 8746 | 9216 | 17,962 |
| 50 to 54 | 9838 | 10511 | 20,349 |
| 55 to 59 | 9742 | 10670 | 20,412 |
| 60 to 64 | 8552 | 9206 | 17,758 |
| 65 to 69 | 6515 | 7405 | 13,920 |
| 70 to 74 | 4268 | 5097 | 9,365 |
| 75 to 79 | 2848 | 4013 | 6,861 |
| 80 to 84 | 2209 | 3290 | 5,499 |
| 85+ | 1850 | 4009 | 5,859 |
Dauphin 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 | 120222 | 128724 | 248,946 |
| WAC | 101384 | 107190 | 208,574 |
| WA | 97781 | 103288 | 201,069 |
| NHWAC | 92621 | 98629 | 191,250 |
| NHWA | 89641 | 95415 | 185,056 |
| BAC | 27311 | 29804 | 57,115 |
| NHBAC | 24728 | 27042 | 51,770 |
| BA | 24303 | 26495 | 50,798 |
| NHBA | 22276 | 24350 | 46,626 |
| H | 11278 | 11229 | 22,507 |
| HWAC | 8763 | 8561 | 17,324 |
| HWA | 8140 | 7873 | 16,013 |
| AAC | 5597 | 5993 | 11,590 |
| NHAAC | 5426 | 5810 | 11,236 |
| AA | 4911 | 5250 | 10,161 |
| NHAA | 4804 | 5147 | 9,951 |
| TOM | 3939 | 4293 | 8,232 |
| NHTOM | 3256 | 3544 | 6,800 |
| HBAC | 2583 | 2762 | 5,345 |
| HBA | 2027 | 2145 | 4,172 |
| IAC | 1216 | 1392 | 2,608 |
| NHIAC | 801 | 933 | 1,734 |
| HTOM | 683 | 749 | 1,432 |
| IA | 458 | 530 | 988 |
| HIAC | 415 | 459 | 874 |
| HIA | 253 | 294 | 547 |
| NHIA | 205 | 236 | 441 |
| NAC | 211 | 224 | 435 |
| HAAC | 171 | 183 | 354 |
| NHNAC | 122 | 131 | 253 |
| HAA | 107 | 103 | 210 |
| NA | 108 | 97 | 205 |
| HNAC | 89 | 93 | 182 |
| HNA | 68 | 65 | 133 |
| NHNA | 40 | 32 | 72 |
• Lancaster County population
38.4 mi, 
131°
• York County
34.1 mi, 
174°
• Cumberland County
30.1 mi, 
235°
• Schuylkill County
36.3 mi, 
56°
• Lebanon County
17.5 mi, 
99°
• Northumberland County
30.6 mi, 
8°
• Perry County
24.9 mi, 
267°
• Union County
40.4 mi, 
340°
• Snyder County
27.9 mi, 
328°
• Juniata County
33 mi, 
284°
[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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