Both Vermont and Delaware have a population of around 600,000 people, according to the 2020 census.
Both Alaska and Delaware have a population of around 700,000 people, according to the 2020 census.
Both North Dakota and Delaware have a population of around 760,000 people, according to the 2020 census.
Both South Dakota and Delaware have a population of around 880,000 people, according to the 2020 census.
Both Rhode Island and Delaware have a population of around 1 million people, according to the 2020 census.