The Consulate General of Italy is located at 1330 Post Oak Boulevard, suite 1950 – Houston, TX 77056.
It provides its services to over 15,000 compatriots residing in the states of Texas, Arkansas, Louisiana and Oklahoma.
There are also two Honorary Consulates in Dallas and New Orleans and a consular correspondent in San Antonio.
Check at this link which is the competent Italian Consulate for the place where you are.