The 1940 U.S. Census records were recently released by the National Archives. With a little work you can find any street (that existed in 1940) and see the census forms. They tell you the names, ages, occupations, salaries and state or country of birth for all residents. I was able to locate my mother and her family in South Philly. My father grew up in the Bronx and though I couldn’t find him (his parents briefly lived in New Rochelle, NY), I was able to track down other members of the family at the apartment we used to visit in my youth.
