The land area of Los Angeles County, CA was 4,058 in 2017.

Land Area

Water Area

Land area is a measurement providing the size, in square miles, of the land portions of geographic entities for which the Census Bureau tabulates and disseminates data. Area is calculated from the specific boundary recorded for each entity in the Census Bureau's geographic database. Land area is based on current information in the TIGER® data base, calculated for use with Census 2010.

Water Area figures include inland, coastal, Great Lakes, and territorial sea water. Inland water consists of any lake, reservoir, pond, or similar body of water that is recorded in the Census Bureau's geographic database. It also includes any river, creek, canal, stream, or similar feature that is recorded in that database as a two- dimensional feature (rather than as a single line). The portions of the oceans and related large embayments (such as Chesapeake Bay and Puget Sound), the Gulf of Mexico, and the Caribbean Sea that belong to the United States and its territories are classified as coastal and territorial waters; the Great Lakes are treated as a separate water entity. Rivers and bays that empty into these bodies of water are treated as inland water from the point beyond which they are narrower than 1 nautical mile across. Identification of land and inland, coastal, territorial, and Great Lakes waters is for data presentation purposes only and does not necessarily reflect their legal definitions.

Above charts are based on data from the U.S. Census American Community Survey | ODN Dataset | API - Notes:

1. ODN datasets and APIs are subject to change and may differ in format from the original source data in order to provide a user-friendly experience on this site.

2. To build your own apps using this data, see the ODN Dataset and API links.

3. If you use this derived data in an app, we ask that you provide a link somewhere in your applications to the Open Data Network with a citation that states: "Data for this application was provided by the Open Data Network" where "Open Data Network" links to http://opendatanetwork.com. Where an application has a region specific module, we ask that you add an additional line that states: "Data about REGIONX was provided by the Open Data Network." where REGIONX is an HREF with a name for a geographical region like "Seattle, WA" and the link points to this page URL, e.g. http://opendatanetwork.com/region/1600000US5363000/Seattle_WA

Geographic and Area Datasets Involving Los Angeles County, CA

  • API

    Building and Safety Permit Information

    data.lacity.org | Last Updated 2019-09-16T09:15:28.000Z

    The Department of Building and Safety issues permits for the construction, remodeling, and repair of buildings and structures in the City of Los Angeles. Permits are categorized into building permits, electrical permits, and mechanical permits (which include plumbing, HVAC systems, fire sprinklers, elevators, and pressure vessels). Depending on the complexity of a project, a permit may be issued the same day with Express Permit or e-Permit ("No Plan Check" category), or a permit may require that the plans be reviewed ("Plan Check" category) by a Building and Safety Plan Check personnel.

  • API

    Next Generation Simulation (NGSIM) Vehicle Trajectories and Supporting Data

    data.transportation.gov | Last Updated 2018-11-09T20:10:34.000Z

    Researchers for the Next Generation Simulation (NGSIM) program collected detailed vehicle trajectory data on southbound US 101 and Lankershim Boulevard in Los Angeles, CA, eastbound I-80 in Emeryville, CA and Peachtree Street in Atlanta, Georgia. Data was collected through a network of synchronized digital video cameras.NGVIDEO, a customized software application developed for the NGSIM program, transcribed the vehicle trajectory data from the video. This vehicle trajectory data provided the precise location of each vehicle within the study area every one-tenth of a second, resulting in detailed lane positions and locations relative to other vehicles. Click the "Show More" button below to find additional contextual data and metadata for this dataset.

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    DCFS Service Areas

    data.lacounty.gov | Last Updated 2018-07-17T15:33:51.000Z

    The Los Angeles County Department of Children and Family Services (DCFS) uses ZIP Codes to distribute its workload among its 19 regional field offices. (Visit https://egis3.lacounty.gov/dataportal/2013/10/30/dcfs-office-service-areas-by-zip-codes/ for GIS data downloads.) For more information, please visit dcfs.lacounty.gov. To report child abuse in Los Angeles County, California, contact the Child Protection Hotline 24 hours a day, 7 days a week Toll-free within California:Main phone number: (800) 540-4000.If calling from outside of California: (213) 639-4500TDD [Hearing Impaired]: (800) 272-6699.

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    LOS ANGELES COUNTY RESTAURANT AND MARKET INSPECTIONS

    data.lacounty.gov | Last Updated 2019-07-11T22:41:08.000Z

    This dataset contains Environmental Health Inspection Results for Restaurants and Markets in Los Angeles County. Los Angeles County Environmental Health is responsible for inspections and enforcement activities for all unincorporated areas and 85 of the 88 cities in the County. This dataset does not include Pasadena, Long Beach or Vernon (each has its own city health department). Each row represents one inspection result. The Serial Number is the primary key to access/review the violations (Violations Dataset) associated with a particular inspection.

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    LOS ANGELES COUNTY RESTAURANT AND MARKET VIOLATIONS

    data.lacounty.gov | Last Updated 2019-07-15T20:13:57.000Z

    This dataset contains Environmental Health Violations for Restaurants and Markets in Los Angeles County. Los Angeles County Environmental Health is responsible for checking food violations for all unincorporated areas and 85 of the 88 cities in the County. This dataset does not include Pasadena, Long Beach or Vernon (each has its own city health department). Each row represents one health code violation. All rows with the same Serial Number are part of the same inspection. The Serial Number is the primary key to review the inspection grade (Inspection Result dataset)

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    Traffic Count Data

    data.lacounty.gov | Last Updated 2018-10-16T23:40:39.000Z

    The County of Los Angeles conducts over 1600 vehicular traffic volume counts per year. The data is a compilation of Average Daily Traffic (ADT) gathered largely from the unincorporated areas of the County of Los Angeles. The data includes the location, count date, 24-hour ADT, AM Peak, and PM Peak.

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    Publicly-Owned Properties

    controllerdata.lacity.org | Last Updated 2019-06-18T23:30:17.000Z

    This dataset contains all properties in the City of Los Angeles owned by the following public entities: Federal GSD, State of California, Los Angeles County, City of Los Angeles, LAUSD, and Metro. This data on property ownership was derived from the data made available by the Los Angeles County Assessor's Office, here: https://data.lacounty.gov/Parcel-/Assessor-Publicly-Owned-Parcels-Listing/a9jw-tqfp/data

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    LADWP Water Supply in Acre Feet

    data.lacity.org | Last Updated 2019-01-29T23:52:09.000Z

    Sources of LADWP Water Supply in Acre Feet. MWD - Metropolitan Water District, LA Aqueduct, Local Groundwater, and Recycled Water.

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    Los Angeles County Civic Art Collection

    data.lacounty.gov | Last Updated 2019-04-16T22:41:47.000Z

    The County's collection is comprised of contemporary and historic permanent public artworks located on County property. The breadth of the collection includes artworks that have been donated to the County, artworks commissioned under the auspices of the Board of Supervisors and various County Departments, pilot projects managed by the Los Angeles County Arts Commission that led to the establishment of the Civic Art Program, and artworks created since the 2005 launch of the new Civic Art Program. The Arts Commission is responsible for managing assessing the condition of all public artworks in the County collection.

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    Assessor - Publicly Owned Parcels Listing

    data.lacounty.gov | Last Updated 2019-09-18T17:01:41.000Z

    Listing of current parcels within Los Angeles County owned by governmental or public agencies. NOTE: Because of lesser priority given to maintaining property records for non-taxable government-owned parcels, the parcel usage and even the property address shown here may not be up-to-date.