I have already found the Enumeration Districts for my family in Salt Lake City using Steve Morse's site.  I was able to obtain the street addresses from older family members and written family histories to plug into the website.   I typed in the street addresses and found the EDs.  I just now have to wait for Monday to roll around.  I will still probably have several pages to look through, but the enumeration districts for my family were one block east and west and about 8 blocks north and south in SLC - a manageable task. http://stevemorse.org/census/unified.html Once you have the ED, you can also look at the maps of the EDs.  For the maps and other information about the 1940 census, see http://www.archives.gov/research/census/1940/ Rebecca Christensen