Had a look at the Midwestern cities of Chicago, Cleveland and St. Louis.
In terms of census tracts, the Hill in St. Louis (47% Italian ancestry) was the highest of anywhere in the three. But beyond that no concentrations.
The most Italian tract in the city of Cleveland - which contains Little Italy - is 16% Italian ancestry. There is an Italian concentration in the eastern suburbs, with tracts that are at least 20% and as much as 1/3 Italian ancestry. For example:
Mayfield Heights (pop. 19,000): 24.8% Italian ancestry, 3.3% speak Italian home
Highland Heights (pop. 8,500): 30.6% Italian ancestry, 2.8% speak Italian at home
http://statisticalatlas.com/county/O...ounty/Ancestry
Chicago's Italian concentration is in the city's northwest fringe and western suburbs, where there are some 20%+ Italian tracts (and a few scattered 30%). For selected places:
Norridge (pop. 15,000): 17.6% Italian ancestry, 7.5% speak Italian at home
Harwood Heights (pop. 8,500): 17.3% Italian ancestry, 6% speak Italian at home
Elmwood Park (pop. 25,000): 20.2% Italian ancestry, 4.9% speak Italian at home
Bloomingdale (pop. 22,000): 21.4% Italian ancestry, 2.5% speak Italian at home
http://statisticalatlas.com/county/I...ounty/Ancestry
http://statisticalatlas.com/county/I...ounty/Ancestry