The western half of the country is almost entirely orange on FamilySearch’s 1940 census index progress map, indicating states with free, searchable name indexes.
Californiathe fifth largest US state in 1940is the latest addition. Iowa, Nebraska, New Mexico and Washington also have been added, bringing FamilySearch’s total of searchable states to 29.
In all, you can search the 1940 census for 31 states plus Washington, DC.
On Ancestry.com, Delaware, Maine, Nevada, New York and Washington DC are searchable by name for free.
MyHeritage.com has Rhode Island and part of New York indexed, also free to search.
Remember, you can browse the records for all states and territories for free on FamilySearch.org, findmypast.com, Ancestry.com, MyHeritage.com and the National Archives.