Dear Ms. Williamson,
Thank you for posting your request on History Hub!
Along with the information from the previous poster, we searched the National Archives Catalog and located the Population Schedules for the 1940 Census in the Records of the Bureau of the Census (Record Group 29) that includes a file unit titled 1940 Census - California - Los Angeles County for Enumeration Districts (ED) 60- 237 & ED 60-238 which should contain information for the Boyle Heights area. These images are digitized and available using the Catalog.
We hope this is helpful. Best of luck with your research!
Tract maps are helpful, but not completely what you are after. Census tracts are bigger than an enumeration district (ED).
I am not certain of the actual boundaries of Boyle Heights. With the zip codes you provided and the following links, I made a map overlay of the area. Using that info, Boyle Heights can be found on these pages:
Los Angeles City – Part 3
Roughly Tracts 121 to 135
For better Tract maps of this area:
At top of page, select:
image LosAngeles28. Also LosAngeles31.
Los Angeles County (area) – Part 3
Roughly 484 to 490 Brooklyn St can be read. This section may be outside the area you want.
Toward the right-hand side, near the big “52”—Brooklyn Ave is now Cesar E. Chavez Ave.
Zip Code map
1950 census map (with EDs from adjacent area)
The road names are very clear and should have mostly the same street names as 1940. This map, or the above Tract maps, could be used in conjunction with the 1940 ED descriptions to hand-draw the ED boundaries.
about midway across (Brooklyn is below the crease)
This site has several census tools that help tremendously (like the one used above). Look for the section of the list that starts with “1870-1950 Large-City ED Finder” to find the tools. A lot of this information was found using these tools.
This tool may be especially helpful to you. Make sure to select “1940” at the top of the page.
1870-1950 Large-City Street Finder: Obtaining Streets in the 1880 to 1950 Census in One Step
The EDs for part of the three zip codes are 60-645 to 723, with possibly the east part of 724. This covers the area in a basic square shape, roughly from Mission Road & Valley Blvd on the north, Indiana St and a straight line north from it on the east (LA city limits in 1940), E Washington Blvd on the south, the river on the west (using current road names).
The ED descriptions are found on image 828 through 860.
The area east of this is in Belvedere Judicial Township. I didn’t locate the ED map for this area (I may have missed it), so you would need to look at the ED descriptions to see which ones you want to include. The area is found in Tracts 484 to 490. These run from at 19-8 to 29.
The ED descriptions are found on image 66 through 73.
The streets in ED descriptions are always in a clockwise sequence:
streets on the north
on the east
on the south
on the west
The ED map has a lot of city information on it, not just EDs. The original map had boundaries drawn in color. Here is a little of what you are seeing on the Boyle Heights area map:
11 in a circle - not certain what this is
9 (to the left of the 11) - Councilmanic District
52 - Assembly District
126 (under 52) - Tract number
ED (under 52) – 674 to 678 (they are given in a range)
19 in circle (very faint, to the right of “Belvedere”) – regional code for Los Angeles County outside Los Angeles City (that area is 60).
The 1940 census key:
From Map 3
This is from the 1950 census. It’s easier to understand in color.
From Map 2
Hope this helps. Happy Hunting!