(Some historical census data is also available through the Historical Census Browser, and from the U.S. Census Bureau's Selected Decennial Census.
[1790] Return of the whole number of persons within the several districts of the United States
HA 201 1790.A4; and (Arch-SpecColl) 310 Un4c C-1 Re
[1800] Return of the whole number of persons within the several districts of the United States
HA 201 1800.A4; and (Arch-SpecColl)xx 310 Un4c C-2 Re
[1810] Return of the whole number of persons within the several districts of the United States
HA 201 1810.A4; and (Arch-SpecColl) xx 310 Un4c C-3 Re
Census of 1820
HA 201 1820.A4; and (Arch-SpecColl) 310 Un4c-C-4 C
[1830] Fifth census; or, Enumeration of the inhabitants of the United States
HA 201 1830.A4; and (Arch-SpecColl) xx 310 Un4c C-5 F
[1840] Compendium of the enumeration of the inhabitants and statistics of the United States
HA 201 1840.A4; and (Arch-SpecColl) x 310 Un4c C-6 Co
The seventh census of the United States: 1850
HA 201 1840.A4; and (Arch-SpecColl) x 310 Un4c C-7
Population of the United States in 1860
HA 201 1830.A4; and x 310 Un4c C-8 Po
[1870] A compendium of the ninth census
HA 201 1870.A4; and 310 Un4c C-9 Co
[Census reports] Tenth census. June 1, 1880
HA 201 1880.A4; and x 310 Un4c C-10 Vol 1-10
[Census reports] Eleventh census: 1890
HA 201 1890.A4; and x 310 Un4c C-11 (15 volumes)
Census reports-- Twelfth census of the United States, taken in the year 1900
HA 201 1900.A4; and x 310 Un4c C-12 (10 volumes)
Thirteenth census of the United States, taken in the year 1910
x 310 Un4c C-13 (11 volumes)
Fourteenth census of the United States, taken in the year 1920
x 310 Un4c C-14 (11 volumes)
Fifteenth census of the United States: 1930.
x 310 Un4c C-15 (10 volumes)
Sixteenth census of the United States: 1940: Population ..
x 310 Un4c C-16 Po (17 volumes)
1950 CENSUS OF POPULATION
x 310 Un4c C-17 Po
1960 CENSUS OF POPULATION x 310 Un4c C-18 Po
1970 CENSUS OF POPULATION: CHARACTERISTICS OF THE POPULATION
x HA 201 1970 A568 1970
and CENSUS OF POPULATION: GENERAL SOCIAL AND ECONOMIC CHARACTERISTICS, U.S. SUMMARY
HA 201 1970.U524
1980 CENSUS OF POPULATION: GENERAL POPULATION CHARACTERISTICS
HA 201 1980e
1990 GENERAL POPULATION CHARACTERISTICS
HA 201 1990 P 1990
and CENSUS OF POPULATION: SOCIAL AND ECONOMIC CHARACTERISTICS
HA 201 1990 A77
2000 Census (http://www.census.gov/)