Last official estimated population of Baltimore County was 806,233 (year 2014)[1]. This was 0.253% of total US population and 13.4% of total Maryland state population. Area of Baltimore County is 681.8 mi² (=1765.7 km²), in this year population density was 1,182.58 p/mi². If population growth rate would be same as in period 2010-2014 (+0.04%/yr), Baltimore County population in 2025 would be 809,553 [0].
Historical population of Baltimore 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] +4.25 %/yr
[1800-1810] +2.53 %/yr
[1810-1820] +2.41 %/yr
[1820-1830] +2.31 %/yr
[1830-1840] +1.07 %/yr
[1840-1850] +4.6 %/yr
[1850-1860] -12.7 %/yr
[1860-1870] +1.59 %/yr
[1870-1880] +2.77 %/yr
[1880-1890] -1.33 %/yr
[1890-1900] +2.21 %/yr
[1900-1910] +3.03 %/yr
[1910-1920] -4.8 %/yr
[1920-1930] +5.23 %/yr
[1930-1940] +2.26 %/yr
[1940-1950] +5.66 %/yr
[1950-1960] +6.18 %/yr
[1960-1970] +2.35 %/yr
[1970-1980] +0.54 %/yr
[1980-1990] +0.54 %/yr
[1990-2000] +0.86 %/yr
[2000-2005] +0.92 %/yr
[2005-2010] +0.4 %/yr
[2010-2014] +0.04 %/yr
Looking for settlements in Baltimore County? Visit this page: Settlements in Baltimore County, MD
Population of Baltimore County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 24960 | 24964 | 49,924 |
| 5 to 9 | 25143 | 24361 | 49,504 |
| 10 to 14 | 25116 | 23999 | 49,115 |
| 15 to 19 | 26354 | 26444 | 52,798 |
| 20 to 24 | 27324 | 27900 | 55,224 |
| 25 to 29 | 28732 | 30670 | 59,402 |
| 30 to 34 | 26583 | 29053 | 55,636 |
| 35 to 39 | 23731 | 26143 | 49,874 |
| 40 to 44 | 24141 | 27016 | 51,157 |
| 45 to 49 | 25474 | 28375 | 53,849 |
| 50 to 54 | 28208 | 31611 | 59,819 |
| 55 to 59 | 27818 | 31621 | 59,439 |
| 60 to 64 | 23238 | 27163 | 50,401 |
| 65 to 69 | 18857 | 22481 | 41,338 |
| 70 to 74 | 12491 | 15897 | 28,388 |
| 75 to 79 | 8882 | 12275 | 21,157 |
| 80 to 84 | 6840 | 10650 | 17,490 |
| 85+ | 7471 | 14939 | 22,410 |
Baltimore 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 | 370205 | 415313 | 785,518 |
| WAC | 260355 | 280859 | 541,214 |
| WA | 252451 | 272353 | 524,804 |
| NHWAC | 242962 | 264705 | 507,667 |
| NHWA | 236010 | 257175 | 493,185 |
| BAC | 109389 | 132740 | 242,129 |
| NHBAC | 106213 | 129169 | 235,382 |
| BA | 103751 | 126289 | 230,040 |
| NHBA | 101220 | 123407 | 224,627 |
| AAC | 27072 | 28015 | 55,087 |
| NHAAC | 26564 | 27488 | 54,052 |
| AA | 23939 | 24736 | 48,675 |
| NHAA | 23646 | 24435 | 48,081 |
| H | 21158 | 20249 | 41,407 |
| HWAC | 17393 | 16154 | 33,547 |
| HWA | 16441 | 15178 | 31,619 |
| TOM | 9220 | 10066 | 19,286 |
| NHTOM | 8159 | 8982 | 17,141 |
| IAC | 4054 | 4499 | 8,553 |
| HBAC | 3176 | 3571 | 6,747 |
| NHIAC | 2926 | 3390 | 6,316 |
| HBA | 2531 | 2882 | 5,413 |
| IA | 1700 | 1800 | 3,500 |
| HIAC | 1128 | 1109 | 2,237 |
| NHIA | 1013 | 1146 | 2,159 |
| HTOM | 1061 | 1084 | 2,145 |
| NAC | 662 | 729 | 1,391 |
| HIA | 687 | 654 | 1,341 |
| HAAC | 508 | 527 | 1,035 |
| NHNAC | 478 | 530 | 1,008 |
| NA | 302 | 318 | 620 |
| HAA | 293 | 301 | 594 |
| HNAC | 184 | 199 | 383 |
| NHNA | 157 | 168 | 325 |
| HNA | 145 | 150 | 295 |
• Montgomery County population
37.8 mi, 
236°
• Baltimore city
9.9 mi, 
178°
• Anne Arundel County
31.2 mi, 
174°
• York County
33.6 mi, 
349°
• Howard County
21.1 mi, 
231°
• Harford County
18.1 mi, 
68°
• Carroll County
22.8 mi, 
291°
• Cecil County
36.9 mi, 
77°
• Queen Anne's County
39.9 mi, 
134°
• Kent County
29.7 mi, 
118°
[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 2 Maryland Notes
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