Puerto Rico Census
[Please add information]
The Treaty of Paris (1898) ceded Puerto Rico to the United States (from Spain). Puerto Rico was not included in the 1900 U.S. federal census, however, it has been included ever since then.
To find ancestors living in Puerto Rico during the 1910, 1920, and 1930 U.S. Census search the census online databases as if you were searching in any other state.