Immigration Trends

Montgomery County (PA)

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

120,405 foreign-born residents on file this year

Italy

26,303

United Kingdom

17,719

Germany

16,169

U.S.S.R.

12,831

Ireland (Eire)

10,122

1950

24,446 foreign-born residents on file this year

Italy

6,235

Germany

3,373

Ireland (Eire)

3,029

England and Wales

2,115

Poland

1,636

1940

25,624 foreign-born residents on file this year

Italy

6,861

Germany

3,434

Irish Free State (Eire)

2,728

England

2,229

Poland

1,760

1930

30,119 foreign-born residents on file this year

Italy

7,279

Irish Free State

3,973

Germany

3,746

England

2,906

Poland

2,303

1920

24,669 foreign-born residents on file this year

Italy

6,480

Ireland

5,488

Germany

2,512

England

2,300

Poland

1,851

1910

23,283 foreign-born residents on file this year

Ireland

6,339

Italy

5,277

Germany

3,058

England

2,243

Russia

1,813

1900

20,730 foreign-born residents on file this year

Ireland

6,604

Germany

2,977

Other Colored >> Female

2,324

Other Colored >> Male

2,235

England

2,054