Naturalization Information in U.S. Census Schedules

U.S. census records reported the following naturalization information:

1820

Foreigners not naturalized 
 

1830 

Aliens, Foreigners not naturalized 
 

1870 

Column 19 - Male citizens of U.S. 21 years of age and upwards

Column 20 - Male citizens of U.S. 21 years of age and upwards where right to vote is denied on other grounds than rebelling or other crime 
 

1900

Column 18 - Naturalization 
 

1910

Column 16 - Whether naturalized or alien 
 

1920

Column 14 - Naturalized or alien

Column 15 - If naturalized, year of naturalization 
 

1930

Column 23 - Naturalized or alien

Abbreviations used in census records relating to naturalization

AL - Individual was still an alien and had not begun the naturalization process.

PA - The individual had filed his “first papers,” also known as declaration of intention.

NA - A naturalized citizen, the individual had completed the naturalization process.