Top countries of origin for this county's foreign-born population, decade by decade,
1900-1960 -- the same IPUMS NHGIS census tables behind
Population Trends,
read for country-of-birth instead of race. No comparable county-level series exists past
1960 in this data (same real gap Population Trends names for its own 1960-2023 span).
1960
720,653 foreign-born residents on file this year
Italy
89,434
U.S.S.R.
86,952
Germany
76,125
Other American countries
74,907
Ireland (Eire)
67,305
1950
480,122 foreign-born residents on file this year
Germany
64,976
Italy
61,451
The U.S.S.R.
50,492
Ireland (Eire)
48,015
Poland
37,019
1940
554,131 foreign-born residents on file this year
Italy
88,074
Germany
72,785
Irish Free State (Eire)
60,494
Russia (U.S.S.R.)
59,335
Poland
38,446
1930
641,618 foreign-born residents on file this year
Italy
117,740
Irish Free State
86,548
Russia
69,685
Germany
69,111
Poland
59,120
1920
924,163 foreign-born residents on file this year
Russia
193,775
Italy
184,546
Ireland
116,749
Germany
70,836
Austria
65,603
1910
1,268,381 foreign-born residents on file this year
Oluwadi