If you are looking at teaching in a new area,  it helps to see where the Italian population is strongest.

Obviously, large cities are where you will find most students, but if you are looking at a broad area, this info may be of interest.

Italian language statistics for California vary depending on where you look.

Two fairly good sources are MLA and the US Census Bureau.

(need links to these sites) 

Accoring to MLA the stats for California residents are:

According to the Census Bureau from 2000 Census, Marin and Sonoma Counties (the area where I live) have over 60,000 Italians, with around 9% of the population!  Where are you all?? I only saw about 2000 of you during the world cup final!