Maryland
People per square mile, 1990:
People per square mile, 2000:
Historic & Projected Growth
1790 to 2030

| Year | Population | Year | Population | Year | Population | ||
| 1790 | 319,728 | 1880 | 934,943 | 1970 | 3,923,897 | ||
| 1800 | 341,548 | 1890 | 1,042,390 | 1980 | 4,216,933 | ||
| 1810 | 380,546 | 1900 | 1,188,044 | 1990 | 4,781,468 | ||
| 1820 | 407,350 | 1910 | 1,295,346 | 2000 | 5,296,486 | ||
| 1830 | 447,040 | 1920 | 1,449,661 | 2010 | 5,904,970 | ||
| 1840 | 470,019 | 1930 | 1,631,526 | 2020 | 6,497,626 | ||
| 1850 | 583,034 | 1940 | 1,821,244 | 2030 | 7,022,251 | ||
| 1860 | 687,049 | 1950 | 2,343,001 | ||||
| 1870 | 780,894 | 1960 | 3,100,689 |
Population By County
| Census 2000 Population |
Change from 1990 |
Percent Change |
|
| MARYLAND | 5,296,486 | 515,018 | 10.8 |
| Allegany County | 74,930 | -16 | 0.0 |
| Anne Arundel County | 489,656 | 62,417 | 14.6 |
| Baltimore County | 754,292 | 62,158 | 9.0 |
| Calvert County | 74,563 | 23,191 | 45.1 |
| Caroline County | 29,772 | 2,737 | 10.1 |
| Carroll County | 150,897 | 27,525 | 22.3 |
| Cecil County | 85,951 | 14,604 | 20.5 |
| Charles County | 120,546 | 19,392 | 19.2 |
| Dorchester County | 30,674 | 438 | 1.4 |
| Frederick County | 195,277 | 45,069 | 30.0 |
| Garrett County | 29,846 | 1,708 | 6.1 |
| Harford County | 218,590 | 36,458 | 20.0 |
| Howard County | 247,842 | 60,514 | 32.3 |
| Kent County | 19,197 | 1,355 | 7.6 |
| Montgomery County | 873,341 | 116,314 | 15.4 |
| Prince George's County | 801,515 | 72,247 | 9.9 |
| Queen Anne's County | 40,563 | 6,610 | 19.5 |
| St. Mary's County | 86,211 | 10,237 | 13.5 |
| Somerset County | 24,747 | 1,307 | 5.6 |
| Talbot County | 33,812 | 3,263 | 10.7 |
| Washington County | 131,923 | 10,530 | 8.7 |
| Wicomico County | 84,644 | 10,305 | 13.9 |
| Worcester County | 46,543 | 11,515 | 32.9 |
| Baltimore city | 651,154 | -84,860 | -11.5 |
SOURCE: U.S. Bureau of the Census
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