The Census Bureau (http://www.census.gov/)maintains geographic boundaries for the analysis and mapping of demographic information across the United States. Every 10 years the Census Bureau counts the population of the United States as mandated by Constitution. The Census Bureau releases the results of this county as demographic data with geographic identifiers so that maps and analysis can be performed on the US population.

There are little more Census Tracts within Los Angeles County in 2020 Census TIGER/Line Shapefiles, compared to 2010.

UPDATED:

1. September 2023: Previous census tract data for Long Beach breakwater was broken into different silver polygons for land-based tracts. These silvers were merged into bigger tract 990300 based on 2022 TIGER Line Shapefile. In addition, Santa Catalina Island and San Clemente Island tract boundary were updated based on DWP City boundary and CSA boundary (except CT 599000 in Avalon).

2. December 2022: Aligned census tract boundary with updated city boundary along shoreline/coastal areas, from Malibu to Long Beach. This data also includes Long Beach City water area tract 990300.

3. September 2022: Previous dataset from March 2021 was clipped to County boundary. New dataset retains shoreline census geography in their entirety.

CREATED: March 2021

How was this data created?

This geographic file was downloaded from Census Bureau website: https://www2.census.gov/geo/tiger/TIGER2020PL/STATE/06_CALIFORNIA/06037/on February, 2021 and customized for LA County.

Data Fields:

1. CT20 (TRACTCE20): 6-digit census tract number

2. Label (NAME20): Decimal point census tract number

Note:

If you are interested to check original census tract 2020 boundary, review the census block 2020 data (CT20 field).