Population by age groups, race and gender, and the poverty by race is attached to the split tract geography to create this split tract with population and poverty data. Split tract data is the product of 2020 census tracts split by 2023 incorporated city boundaries and unincorporated community/countywide statistical areas (CSA) boundaries as of July 1, 2023. The census tract boundaries have been altered and aligned where necessary with legal city boundaries and unincorporated areas, including shoreline/coastal areas.

Census Tract:

Every 10 years the Census Bureau counts the population of the United States as mandated by Constitution. The Census Bureau (https://www.census.gov/)released 2020 geographic boundaries data including census tracts for the analysis and mapping of demographic information across the United States.

City Boundary:

City Boundary data is the base map information for the County of Los Angeles. These City Boundaries are based on the Los Angeles County Seamless Cadastral Landbase. The Landbase is jointly maintained by the Los Angeles County Assessor and the Los Angeles County Department of Public Works (DPW). This layer represents current city boundaries within Los Angeles County. The DPW provides the most current shapefiles representing city boundaries and city annexations. True, legal boundaries are only determined on the ground by surveyors licensed in the State of California.

Countywide Statistical Areas (CSA):

The countywide Statistical Area (CSA) was defined to provide a common geographic boundary for reporting departmental statistics for unincorporated areas and incorporated Los Angeles city to the Board of Supervisors. The CSA boundary and CSA names are established by the CIO and the LA County Enterprise GIS group worked with the Los Angeles County Board of Supervisors Unincorporated Area and Field Deputies that reflect as best as possible the general name preferences of residents and historical names of areas. This data is primarily focused on broad statistics and reporting, not mapping of communities. This data is not designed to perfectly represent communities, nor jurisdictional boundaries such as Angeles National Forest. CSA represent board approved geographies comprised of Census block groups split by cities.

Data Fields:

CT20: 2020 Census tract

FIP22: 2023 City FIP Code

CITY: City name for incorporated cities and “Unincorporated” for unincorporated areas (as of July 1, 2023)

CSA: Countywide Statistical Area (CSA) - Unincorporated area community names and LA City neighborhood names.

CT20FIP23CSA: 2020 census tract with 2023 city FIPs for incorporated cities and unincorporated areas and LA neighborhoods.

SPA22: 2022 Service Planning Area (SPA) number.

SPA_NAME: Service Planning Area name.

HD22: 2022 Health District (HD) number:

HD_NAME: Health District name.

POP23_AGE_0_4: 2023 population 0 to 4 years old

POP23_AGE_5_9: 2023 population 5 to 9 years old

POP23_AGE_10_14: 2023 population 10 to 14 years old

POP23_AGE_15_17: 2022 population 15 to 17 years old

POP23_AGE_18_19: 2023 population 18 to 19 years old

POP23_AGE_20_44: 2023 population 20 to 24 years old

POP23_AGE_25_29: 2023 population 25 to 29 years old

POP23_AGE_30_34: 2023 population 30 to 34 years old

POP23_AGE_35_44: 2023 population 35 to 44 years old

POP23_AGE_45_54: 2023 population 45 to 54 years old

POP23_AGE_55_64: 2023 population 55 to 64 years old

POP23_AGE_65_74: 2023 population 65 to 74 years old

POP23_AGE_75_84: 2023 population 75 to 84 years old

POP23_AGE_85_100: 2023 population 85 years and older

POP23_WHITE: 2023 Non-Hispanic White

POP23_BLACK: 2023 Non-Hispanic African American

POP23_AIAN: 2023 Non-Hispanic American Indian or Alaska Native

POP23_ASIAN: 2023 Non-Hispanic Asian

POP23_HNPI: 2023 Non-Hispanic Hawaiian Native or Pacific Islander

POP23_HISPANIC: 2023 Hispanic

POP23_MALE: 2023 Male

POP23_FEMALE: 2023 Female

POV23_WHITE: 2023 Non-Hispanic White below 100% Federal Poverty Level

POV23_BLACK: 2023 Non-Hispanic African American below 100% Federal Poverty Level

POV23_AIAN: 2023 Non-Hispanic American Indian or Alaska Native below 100% Federal Poverty Level

POV23_ASIAN: 2023 Non-Hispanic Asian below 100% Federal Poverty Level

POV23_HNPI: 2023 Non-Hispanic Hawaiian Native or Pacific Islander below 100% Federal Poverty Level

POV23_HISPANIC: 2023 Hispanic below 100% Federal Poverty Level

POV23_TOTAL: 2023 Total population below 100% Federal Poverty Level

POP23_TOTAL: 2023 Total Population

AREA_SQMil: Area in square mile.

POP23_DENSITY: 2023 Population per square mile.

POV23_PERCENT: 2023 Poverty rate/percentage.

How this data created?

Population by age groups, ethnic groups and gender, and the poverty by ethnic groups is attributed to the split tract geography to create this data. Split tract polygon data is created by intersecting 2020 census tract polygons, LA Country City Boundary polygons and Countywide Statistical Areas (CSA) polygon data. The resulting polygon boundary aligned and matched with the legal city boundary whenever possible.

Notes:

1. Population and poverty data estimated as of July 1, 2023.

2. 2010 Census tract and 2020 census tracts are not the same. Similarly, city and community boundaries are as of July 1, 2023.