Last official estimated population of Harford County was 245,205 (year 2014)[1]. This was 0.077% of total US population and 4.1% of total Maryland state population. Area of Harford County is 526.6 mi² (=1364 km²), in this year population density was 465.60 p/mi². If population growth rate would be same as in period 2010-2014 (+0.04%/yr), Harford County population in 2021 would be 245,870 [0].
Historical population of Harford 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] +1.64 %/yr
[1800-1810] +1.89 %/yr
[1810-1820] -2.85 %/yr
[1820-1830] +0.25 %/yr
[1830-1840] +0.48 %/yr
[1840-1850] +1.24 %/yr
[1850-1860] +1.92 %/yr
[1860-1870] -0.35 %/yr
[1870-1880] +2.18 %/yr
[1880-1890] +0.33 %/yr
[1890-1900] -0.25 %/yr
[1900-1910] -0.11 %/yr
[1910-1920] +0.46 %/yr
[1920-1930] +0.76 %/yr
[1930-1940] +1.04 %/yr
[1940-1950] +3.98 %/yr
[1950-1960] +4.01 %/yr
[1960-1970] +4.16 %/yr
[1970-1980] +2.38 %/yr
[1980-1990] +2.24 %/yr
[1990-2000] +1.86 %/yr
[2000-2005] +1.72 %/yr
[2005-2010] +0.53 %/yr
[2010-2014] +0.04 %/yr
Looking for settlements in Harford County? Visit this page: Settlements in Harford County, MD
Population of Harford County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 7148 | 6708 | 13,856 |
| 5 to 9 | 8040 | 7601 | 15,641 |
| 10 to 14 | 8878 | 8202 | 17,080 |
| 15 to 19 | 8662 | 8172 | 16,834 |
| 20 to 24 | 7901 | 7484 | 15,385 |
| 25 to 29 | 7841 | 7376 | 15,217 |
| 30 to 34 | 7610 | 7853 | 15,463 |
| 35 to 39 | 6924 | 7329 | 14,253 |
| 40 to 44 | 7931 | 8675 | 16,606 |
| 45 to 49 | 9020 | 9600 | 18,620 |
| 50 to 54 | 10119 | 10580 | 20,699 |
| 55 to 59 | 9187 | 9707 | 18,894 |
| 60 to 64 | 7211 | 7903 | 15,114 |
| 65 to 69 | 6086 | 6670 | 12,756 |
| 70 to 74 | 4142 | 4985 | 9,127 |
| 75 to 79 | 2704 | 3333 | 6,037 |
| 80 to 84 | 1721 | 2480 | 4,201 |
| 85+ | 1348 | 2974 | 4,322 |
Harford 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 | 116987 | 122594 | 239,581 |
| WAC | 102176 | 105172 | 207,348 |
| WA | 99394 | 102489 | 201,883 |
| NHWAC | 97576 | 101043 | 198,619 |
| NHWA | 95065 | 98623 | 193,688 |
| BAC | 17809 | 19201 | 37,010 |
| NHBAC | 16994 | 18396 | 35,390 |
| BA | 16036 | 17376 | 33,412 |
| NHBA | 15387 | 16741 | 32,128 |
| H | 5486 | 5038 | 10,524 |
| AAC | 4447 | 5137 | 9,584 |
| NHAAC | 4323 | 5006 | 9,329 |
| HWAC | 4600 | 4129 | 8,729 |
| HWA | 4329 | 3866 | 8,195 |
| AA | 3403 | 4185 | 7,588 |
| NHAA | 3341 | 4111 | 7,452 |
| TOM | 3114 | 3054 | 6,168 |
| NHTOM | 2815 | 2750 | 5,565 |
| IAC | 1113 | 1133 | 2,246 |
| NHIAC | 899 | 891 | 1,790 |
| HBAC | 815 | 805 | 1,620 |
| HBA | 649 | 635 | 1,284 |
| IA | 396 | 405 | 801 |
| HTOM | 299 | 304 | 603 |
| NHIA | 286 | 278 | 564 |
| NAC | 266 | 256 | 522 |
| HIAC | 214 | 242 | 456 |
| NHNAC | 217 | 209 | 426 |
| HAAC | 124 | 131 | 255 |
| NA | 130 | 123 | 253 |
| HIA | 110 | 127 | 237 |
| NHNA | 93 | 91 | 184 |
| HAA | 62 | 74 | 136 |
| HNAC | 49 | 47 | 96 |
| HNA | 37 | 32 | 69 |
• Baltimore County population
18.1 mi, 
248°
• Baltimore city
23.3 mi, 
225°
• New Castle County
35 mi, 
85°
• Lancaster County
35 mi, 
4°
• York County
35 mi, 
319°
• Howard County
38.7 mi, 
239°
• Carroll County
38.2 mi, 
272°
• Cecil County
19.2 mi, 
84°
• Queen Anne's County
36.2 mi, 
161°
• Kent County
22.5 mi, 155°
[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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