39.8 million persons
Geography: Add Kansas, Nevada, Nebraska
Publications: https://www.census.gov/prod/www/decennial.html
50.1 million persons
Geography: Add Colorado, Alaska as a territory.
Publications: https://www.census.gov/prod/www/decennial.html
62.9 million persons
Geography: Add Idaho, Montana, Wyoming, North Dakota, South Dakota. First coverage of Indian Territory.
Publications: https://www.census.gov/prod/www/decennial.html
Note: The original documents of the 1890 census were destroyed in a fire in 1921, and only fragmentary material remains.
75.9 million persons
Geography: Add Utah, Hawaii as a territory. First count of U.S. citizens living abroad.
Publications: https://www.census.gov/prod/www/decennial.html