To what extent is Italian still spoken in Italian American enclaves? Here's the Italian speaking population in selected Chicago, Boston and Philadelphia area ZIP codes:
Chicago:
60706 (Norridge/Harwood Heights) 1,551 6.9%
60707 (Elmwood Park) 1,451 3.6%
Boston:
02155 (Medford) 1,873 3.3%
02151 (Revere) 1,544 3.1%
02149 (Everett) 1,201 3.1%
02128 (East Boston) 1,185 2.9%
Philadelphia:
19145 (South Philadelphia) 1,285 3%
19148 (South Philadelphia) 1,271 2.7%
Source:
http://statisticalatlas.com