Chicago
Polish 812,960
Russian 101,081
Czech 82,282
Lithuanian 62,216
Ukrainian 53,785
Hungarian 43,327
Croatian 41,096
Slovak 35,520
Romanian 31,851
Serbian 29,582
Bulgarian 13,579
Yugoslavian 13,575
Czechoslovakian 12,163
Slovene 11,491
Albanian 11,468
Macedonian 10,151
Latvian 5,386
Cleveland
Polish 160,035
Hungarian 62,024
Slovak 48,081
Slovene 35,712
Russian 24,724
Czech 21,338
Ukrainian 20,273
Croatian 16,056
Romanian 9,746
Serbian 8,837
Lithuanian 6,956
Czechoslovakian 5,620
Detroit
Polish 419,774
Hungarian 43,827
Russian 34,428
Ukrainian 26,721
Romanian 24,290
Albanian 23,908
Slovak 12,396
Lithuanian 12,208
Czech 11,535
Yugoslavian 9,941
Macedonian 9,884
Serbian 7,598
Croatian 6,786
Czechoslovakian 5,824
Pittsburgh
Polish 199,406
Slovak 81,284
Hungarian 40,780
Russian 33,175
Croatian 28,108
Ukrainian 18,359
Czech 16,356
Serbian 11,677
Lithuanian 11,450
Czechoslovakian 7,348