The adult population in Washington, DC (age 18 and older) increased between 2000, 2010, and 2020, and has been estimated to decline by almost 31,000 adults between 2020 and 2021. The number of children increased by approximately 13,500 between 2010 and 2020 and is estimated to increase by almost another 11,500 between 2020 and 2021.
Adult and Child Population in the District of Columbia, 1990-2021
Sources: US Census Bureau Decennial Census and 2021 Population Estimates
Note: The US Census has not yet released age-specific data for 2020. The 18 to 34 year old age group grew substantially between 2000 and 2010, after declining the prior decade. Between 2000 and 2010, this “millennial” group grew by more than 37,000 people and they are estimated to have grown by more than 25,000 between 2010 and 2019. The number of 35 to 64 year olds jumped substantially between 2010 and 2019, growing by nearly 33,000 people.
Adult Population by Age Groups in the District of Columbia, 1990-2019
Sources: US Census Bureau Decennial Census and 2019 Population Estimates
Note: The US Census has not yet released age-specific data for 2020. The estimated number of children under age 5 and those aged 5 to 13 increased by almost 13,000 and 16,000, respectively between 2010 and 2019. The number of 14 to 17 year olds have steadily decreased since 1990.
Child Population by Age Groups in the District of Columbia, 1990-2019
Sources: US Census Bureau Decennial Census and 2019 Population Estimates
