This is a line chart displaying the growth of Baltimore's and Washington's populations from the 1800 census to 2025.
All years ending in 0 use census data; other years are official estimates also from the Census Bureau.
| Year | Baltimore | Washington |
| 1800 | 26514 | 8144 |
| 1810 | 46555 | 15471 |
| 1820 | 62738 | 23336 |
| 1830 | 80620 | 30261 |
| 1840 | 102313 | 33745 |
| 1850 | 169054 | 51687 |
| 1860 | 212418 | 75080 |
| 1870 | 267354 | 131700 |
| 1880 | 332313 | 177624 |
| 1890 | 434439 | 230392 |
| 1900 | 508957 | 278718 |
| 1910 | 558485 | 331069 |
| 1920 | 733826 | 437571 |
| 1930 | 804874 | 486869 |
| 1940 | 859100 | 663091 |
| 1950 | 949708 | 802178 |
| 1960 | 939024 | 763956 |
| 1970 | 905787 | 756510 |
| 1980 | 786741 | 638333 |
| 1990 | 736016 | 606900 |
| 2000 | 651154 | 572059 |
| 2010 | 620961 | 601723 |
| 2011 | 620493 | 620290 |
| 2012 | 623035 | 635737 |
| 2013 | 622591 | 651559 |
| 2014 | 623833 | 663603 |
| 2015 | 622831 | 677014 |
| 2016 | 616542 | 687576 |
| 2017 | 610853 | 697079 |
| 2018 | 603241 | 704147 |
| 2019 | 594601 | 708253 |
| 2020 | 585708 | 689545 |
| 2021 | 576498 | 668791 |
| 2022 | 569107 | 671803 |
| 2023 | 565239 | 678972 |
| 2024 | 568271 | 702250 |
| 2025 | 576358 | 712517 |
