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Delaware population by year, 1990 to 2025

Delaware grew 58 percent since 1990, from 669,063 residents to a record 1.06 million in 2025, ranking 45th among the 50 states.

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What the data shows

  • Delaware: 0.67M in 1990, 1.06M in 2025 (1.6× higher).

About this chart

Delaware crossed 1 million residents in the Census series in 2021, after growing every single year since 1990. The state went from 669,063 in 1990 to 1,059,952 in 2025, a rise of about 58 percent, and its growth has accelerated lately: about 68,000 people were added between 2020 and 2025.

Despite that pace, its place in the rankings has barely changed. Delaware was 46th among the 50 states in 1990 and has been 45th since 2000, including in 2025. It is up 34.8 percent since 2000 and 17.8 percent since 2010. The data are Census Bureau resident estimates for July 1 of each year.

The data

Source: U.S. Census Bureau population estimates, July 1 (vintages 1999, 2000–2010 intercensal, 2020 and 2025), resident population of Delaware, millions. Retrieved November 4, 2026.

Population of Delaware, Residents, 1990 to 2025, 1990–2025
DateDelaware
19900.67M
19910.68M
19920.69M
19930.70M
19940.71M
19950.72M
19960.73M
19970.74M
19980.74M
19990.75M
20000.79M
20010.80M
20020.81M
20030.82M
20040.83M
20050.85M
20060.86M
20070.87M
20080.88M
20090.89M
20100.90M
20110.91M
20120.92M
20130.92M
20140.93M
20150.94M
20160.95M
20170.96M
20180.97M
20190.98M
20200.99M
20211.01M
20221.02M
20231.04M
20241.05M
20251.06M

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Frequently asked questions

What is the population of Delaware?

Delaware had about 1.06 million residents (1,059,952) in July 2025, according to Census Bureau estimates. That ranks 45th among the 50 states.

When did Delaware pass 1 million people?

Delaware's estimate was 992,000 in 2020, about 1.005 million in 2021, and 1.06 million in 2025. It had about 669,000 residents in 1990.

How fast has Delaware grown?

Delaware is up 34.8 percent since 2000 and 17.8 percent since 2010. That has been enough to lift its rank only from 46th in 1990 to 45th.

Where does this data come from?

U.S. Census Bureau population estimates, July 1 (vintages 1999, 2000–2010 intercensal, 2020 and 2025), resident population of Delaware, millions. Retrieved November 4, 2026. You can download the full table as a CSV from this page.

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