Last official estimated population of Allegany County was 74,988 (year 2014)[1]. This was 0.024% of total US population and 1.2% of total Maryland state population. Area of Allegany County is 429.9 mi² (=1113.5 km²), in this year population density was 174.42 p/mi². If population growth rate would be same as in period 2010-2014 (-0.03%/yr), Allegany County population in 2024 would be 74,741 [0].
Historical population of Allegany 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] +2.74 %/yr
[1800-1810] +0.92 %/yr
[1810-1820] +2.28 %/yr
[1820-1830] +2.06 %/yr
[1830-1840] +3.99 %/yr
[1840-1850] +3.79 %/yr
[1850-1860] +2.22 %/yr
[1860-1870] +3.12 %/yr
[1870-1880] -0.14 %/yr
[1880-1890] +0.9 %/yr
[1890-1900] +2.59 %/yr
[1900-1910] +1.52 %/yr
[1910-1920] +1.15 %/yr
[1920-1930] +1.24 %/yr
[1930-1940] +0.95 %/yr
[1940-1950] +0.29 %/yr
[1950-1960] -0.62 %/yr
[1960-1970] -0.01 %/yr
[1970-1980] -0.42 %/yr
[1980-1990] -0.72 %/yr
[1990-2000] -0 %/yr
[2000-2005] -0.25 %/yr
[2005-2010] +0.3 %/yr
[2010-2014] -0.03 %/yr
Looking for settlements in Allegany County? Visit this page: Settlements in Allegany County, MD
Population of Allegany County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1814 | 1659 | 3,473 |
| 5 to 9 | 1800 | 1609 | 3,409 |
| 10 to 14 | 1936 | 1739 | 3,675 |
| 15 to 19 | 2496 | 2433 | 4,929 |
| 20 to 24 | 3574 | 3097 | 6,671 |
| 25 to 29 | 2861 | 1778 | 4,639 |
| 30 to 34 | 2764 | 1793 | 4,557 |
| 35 to 39 | 2405 | 1694 | 4,099 |
| 40 to 44 | 2457 | 1966 | 4,423 |
| 45 to 49 | 2541 | 2053 | 4,594 |
| 50 to 54 | 2636 | 2425 | 5,061 |
| 55 to 59 | 2512 | 2435 | 4,947 |
| 60 to 64 | 2195 | 2289 | 4,484 |
| 65 to 69 | 1984 | 2233 | 4,217 |
| 70 to 74 | 1524 | 1792 | 3,316 |
| 75 to 79 | 1191 | 1455 | 2,646 |
| 80 to 84 | 730 | 1138 | 1,868 |
| 85+ | 673 | 1271 | 1,944 |
Allegany 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 | 37323 | 34434 | 71,757 |
| WAC | 32912 | 33081 | 65,993 |
| NHWAC | 32229 | 32715 | 64,944 |
| WA | 32298 | 32455 | 64,753 |
| NHWA | 31655 | 32124 | 63,779 |
| BAC | 5157 | 1768 | 6,925 |
| NHBAC | 5074 | 1708 | 6,782 |
| BA | 4722 | 1283 | 6,005 |
| NHBA | 4660 | 1246 | 5,906 |
| TOM | 635 | 670 | 1,305 |
| NHTOM | 594 | 633 | 1,227 |
| H | 770 | 425 | 1,195 |
| HWAC | 683 | 366 | 1,049 |
| HWA | 643 | 331 | 974 |
| AAC | 447 | 447 | 894 |
| NHAAC | 440 | 439 | 879 |
| AA | 353 | 360 | 713 |
| NHAA | 348 | 355 | 703 |
| IAC | 194 | 203 | 397 |
| NHIAC | 163 | 178 | 341 |
| HBAC | 83 | 60 | 143 |
| IA | 65 | 71 | 136 |
| NHIA | 53 | 58 | 111 |
| HBA | 62 | 37 | 99 |
| NAC | 36 | 44 | 80 |
| HTOM | 41 | 37 | 78 |
| NHNAC | 27 | 41 | 68 |
| HIAC | 31 | 25 | 56 |
| NA | 20 | 20 | 40 |
| NHNA | 13 | 18 | 31 |
| HIA | 12 | 13 | 25 |
| HAAC | 7 | 8 | 15 |
| HNAC | 9 | 3 | 12 |
| HAA | 5 | 5 | 10 |
| HNA | 7 | 2 | 9 |
• Berkeley County population
37.2 mi, 
107°
• Frederick County
36.7 mi, 
140°
• Somerset County
30.8 mi, 
325°
• Bedford County
28.9 mi, 
22°
• Garrett County
30.8 mi, 
261°
• Mineral County
19.7 mi, 
223°
• Winchester city
41.3 mi, 137°
• Hampshire County
21.3 mi, 
166°
• Morgan County
24.1 mi, 
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• Fulton County
37.1 mi, 
56°
[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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