Familysearch.org provides information about the status of the 1940 U.S. Census indexing project on its website. Click on the1940census.com dashboard in the right-hand corner to view a map of the United States.
The U.S. map provides the status for each state and lists Delaware, Colorado, Kansas, Oregon, Virginia, and New Hampshire as complete. These states are searchable by name, location and family relations.
The states of Alabama, Alaska, Arizona, California, Florida, Idaho, Iowa, Indiana, Louisiana, Maine, Mississippi, Montana, Nevada, North Dakota, Oklahoma, South Dakota, Washington, Utah, Wyoming and Vermont are at or above 85 percent complete. The census images for these states are available to search by county and or city.
If you are interested in the status of another state, click on the state, scroll down to view instructions on how to convert the 1930 census enumeration district to 1940, find a rural ancestor in 1940, convert a 1940 street address to an enumeration district and find your ancestor's 1940 street address.
Other options include “Explore Images by Location.” You can type in the county and/or city of interest, or click on the orange search button to view a list of counties and their available images.