Last official estimated population of Northampton County was 298,028 (year 2014)[1]. This was 0.093% of total US population and 2.3% of total Pennsylvania state population. Area of Northampton County is 377.4 mi² (=977.4 km²), in this year population density was 789.70 p/mi². If population growth rate would be same as in period 2010-2014 (+0.02%/yr), Northampton County population in 2025 would be 298,835 [0].
Historical population of Northampton 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] +2.17 %/yr
[1800-1810] +2.41 %/yr
[1810-1820] -1.81 %/yr
[1820-1830] +2.2 %/yr
[1830-1840] +0.38 %/yr
[1840-1850] -0.19 %/yr
[1850-1860] +1.76 %/yr
[1860-1870] +2.52 %/yr
[1870-1880] +1.36 %/yr
[1880-1890] +1.82 %/yr
[1890-1900] +1.7 %/yr
[1900-1910] +2.5 %/yr
[1910-1920] +1.86 %/yr
[1920-1930] +0.98 %/yr
[1930-1940] -0.02 %/yr
[1940-1950] +0.92 %/yr
[1950-1960] +0.84 %/yr
[1960-1970] +0.63 %/yr
[1970-1980] +0.5 %/yr
[1980-1990] +0.92 %/yr
[1990-2000] +0.79 %/yr
[2000-2005] +1.29 %/yr
[2005-2010] +0.86 %/yr
[2010-2014] +0.02 %/yr
Looking for settlements in Northampton County? Visit this page: Settlements in Northampton County, PA
Population of Northampton County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 7810 | 7342 | 15,152 |
| 5 to 9 | 8702 | 8306 | 17,008 |
| 10 to 14 | 9575 | 9043 | 18,618 |
| 15 to 19 | 10856 | 10052 | 20,908 |
| 20 to 24 | 10852 | 9789 | 20,641 |
| 25 to 29 | 9085 | 8494 | 17,579 |
| 30 to 34 | 8378 | 8553 | 16,931 |
| 35 to 39 | 8174 | 8610 | 16,784 |
| 40 to 44 | 9367 | 9652 | 19,019 |
| 45 to 49 | 10424 | 10637 | 21,061 |
| 50 to 54 | 11322 | 11594 | 22,916 |
| 55 to 59 | 11107 | 11604 | 22,711 |
| 60 to 64 | 9246 | 9860 | 19,106 |
| 65 to 69 | 7702 | 8460 | 16,162 |
| 70 to 74 | 5445 | 6299 | 11,744 |
| 75 to 79 | 3746 | 4774 | 8,520 |
| 80 to 84 | 2779 | 4211 | 6,990 |
| 85+ | 2911 | 5893 | 8,804 |
Northampton 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 | 132807 | 138344 | 271,151 |
| WA | 130023 | 135479 | 265,502 |
| NH | 129254 | 135345 | 264,599 |
| NHWAC | 117175 | 123114 | 240,289 |
| NHWA | 115114 | 120965 | 236,079 |
| H | 18227 | 17828 | 36,055 |
| HWAC | 15632 | 15230 | 30,862 |
| HWA | 14909 | 14514 | 29,423 |
| BAC | 11433 | 11285 | 22,718 |
| BA | 9542 | 9312 | 18,854 |
| NHBAC | 8938 | 8747 | 17,685 |
| NHBA | 7625 | 7368 | 14,993 |
| AAC | 4986 | 5352 | 10,338 |
| NHAAC | 4720 | 5132 | 9,852 |
| AA | 4250 | 4603 | 8,853 |
| NHAA | 4096 | 4489 | 8,585 |
| TOM | 2994 | 3080 | 6,074 |
| HBAC | 2495 | 2538 | 5,033 |
| NHTOM | 2207 | 2297 | 4,504 |
| HBA | 1917 | 1944 | 3,861 |
| IAC | 1253 | 1328 | 2,581 |
| HTOM | 787 | 783 | 1,570 |
| NHIAC | 629 | 689 | 1,318 |
| HIAC | 624 | 639 | 1,263 |
| IA | 532 | 555 | 1,087 |
| HIA | 372 | 385 | 757 |
| NAC | 255 | 250 | 505 |
| HAAC | 266 | 220 | 486 |
| NHIA | 160 | 170 | 330 |
| NA | 140 | 144 | 284 |
| HAA | 154 | 114 | 268 |
| NHNAC | 132 | 136 | 268 |
| HNAC | 123 | 114 | 237 |
| HNA | 88 | 88 | 176 |
| NHNA | 52 | 56 | 108 |
• Montgomery County population
37.6 mi, 
185°
• Bucks County
30.6 mi, 
159°
• Morris County
40.4 mi, 
79°
• Berks County
40.1 mi, 
234°
• Lehigh County
17.7 mi, 
237°
• Somerset County
38.3 mi, 
109°
• Monroe County
21 mi, 
356°
• Hunterdon County
24.4 mi, 
122°
• Warren County
17.1 mi, 
65°
• Carbon County
23.7 mi, 
298°
[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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