Open Census MCP Server

United States Census Bureau | An official website of the United States Government Geography Boundaries by Year Vintage of Geographic Areas for ACS Estimates The ACS typically publishes estimates using the latest available geographic boundaries (also known as "vintages"). For ACS 5-year estimates, use the last year of the estimate period to determine the vintage. For example, the following datasets use the same vintages of geographic boundaries: 2023 ACS 1-year estimates 2019-2023 ACS 5-year estimates To learn more about geographic concepts used in the ACS, check out our geographic handbook Geography and the American Community Survey: What Data Users Need to Know [/programs- surveys/acs/guidance/handbooks/geography.html] . 2023 On this page Vintage of Geographic Areas for ACS Estimates [#vintage-of-geographic-areas-for-acs-estimates] 2023 [#2023] Legal Areas [#legal-areas] Statistical Areas [#statistical-areas] You May Be Interested In [#you-may-be-interested-in] Legal Areas Legally defined geographic areas used in the ACS are updated on an annual basis from a variety of programs, including: the Boundary and Annexation Survey (BAS) [/programs-surveys/bas.html] , the Redistricting Data Program [/programs-surveys/decennial-census/about/rdo.html]  and the School District Review Program [/programs- surveys/sdrp.html] .  Summary Level Geographic Area Vintage of Geographic Area for 2023 ACS Estimate Year 040  050 County Subdivision 067 Place 160 State and State Equivalent January 1, 2023 County or equivalent (Alaska boroughs, Louisana parishes, Puerto Rico municipios, January 1, 2023 independent cities) Township, Minor Civil Division (MCD)/Barrio and Barrio-Pueblo January 1, 2023 Incorporated Place January 1, 2023 American Indian/Alaska Native/Hawaiian Home Land 230 Alaska Native Regional Corporations (ANRCs) 250/252/254 Federal American Indian Reservation (federal AIR) 250/252 251 250/254 State American Indian Reservation (state AIR) American Indian Tribal Subdivision, federal AIR Hawaiian Home Land (HHL) January 1, 2023 January 1, 2023 January 1, 2023 January 1, 2023 January 1, 2023 Other Legal Areas 500 610/620 Congressional District, Delegate District DC, Resident Commissioner District PR 118th Congress of the United States /1 [#CDfootnote] State Legislative Districts (Upper and Lower Chambers) 2022 Legislative Session Year /1 [#CDfootnote] 950/960/970 School District (Elementary, Secondary, Unified) 170 Consolidated City Statistical Areas January 1, 2023 January 1, 2023 For statistical areas, boundary changes are mostly associated with updates from each decennial census. Statistical areas are designed to have stable boundaries over time. Summary Level Geographic Area Vintage of Geographic Area for 2023 ACS Estimate Year 050 County Equivalent (Census Areas in Alaska) January 1, 2023 County Subdivision 060 Place 160 Census County Division (CCD) January 1, 2023 Census Designated Place (CDP)/Zona Urbana and Comunidad Janaury 1, 2023 American Indian/Alaska Native/Hawaiian Home Land 250/252 250/252 250/252 251 256 258 Tribal Designated Statistical Area (TDSA) State Designated Tribal Statistical Area (SDTSA) Oklahoma Tribal Statistical Area (OTSA) American Indian Tribal Subdivision (within OTSA) Tribal Tract Tribal Block Group 2020 Census 2020 Census 2020 Census 2020 Census 2020 Census /2 [#StatGEOfootnote] 2020 Census /2 [#StatGEOfootnote] 250/252 Alaska Native Village Statistical Area (ANVSA) 2020 Census Other Statistical Areas 310 312 400 140 150 795 860 Metropolitan Statistical Area/Micropolitan Statistical Area July 21, 2023 /3 [#CBSAfootnote] /4 [#CBSAfootnote2] Metropolitan Statistical Area/Micropolitan Statistical Area - Principal City July 21, 2023 /3 [#CBSAfootnote] /4 [#CBSAfootnote2] Urban Area Census Tract Census Block Group Public Use Microdata Area (PUMA) 5-digit ZIP Code Tabulation Area (ZCTA) 2020 Census 2020 Census /2 [#StatGEOfootnote] 2020 Census /2 [#StatGEOfootnote] 2020 Census 2020 Census /1 The U.S. Census Bureau collects congressional and state legislative districts every two years through the Redistricting Data Program. Typically, new geography products are generated only when changes to congressional or state legislative districts are reported between sessions. For more information see: Redistricting Data Program [/programs-surveys/decennial-census/about/rdo.html] . /2 Changes to the boundaries of legal areas may cause complementary changes to the boundaries of selected statistical areas. /3 While the American Community Survey (ACS) data generally reflect the Office of Management and Budget (OMB) definitions of metropolitan and micropolitan statistical areas; in certain instances, the names, codes, and boundaries of the principal cities shown in ACS tables may differ from the OMB definitions due to differences in the effective dates of the geographic entities. /4 The 2023 ACS data products for Core Based Statistical Areas (CBSAs), also referred to as Metropolitan and Micropolitan Statistical Areas, are based on post-2020 Census revised delineations published by the Office of Management and Budget (OMB) on July 21, 2023 (OMB Bulletin No. 23-01 [https://www.whitehouse.gov/wp- content/uploads/2023/07/OMB-Bulletin-23-01.pdf] ). For more information see: Metropolitan and Micropolitan [/programs-surveys/metro-micro.html] . * NECTA Geographies have been discontinued starting with the 2023 ACS data release.  For more information visit 2023 Geography Changes [/programs-surveys/acs/technical-documentation/table-and-geography- changes/2023/geography-changes.html] . Related Information American Community Survey Data [/programs-surveys/acs/data.html] Table & Geography Changes [/programs-surveys/acs/technical-documentation/table-and-geography-changes.html] USER NOTES Change to County-Equivalents in the State of Connecticut for 2022 ACS [/programs-surveys/acs/technical-documentation/user- notes/2023-01.html] You May Be Interested In Contact Updates Contact Us Email Updates Share Your ACS Data Story Learn how to contact the American Sign up to receive email updates about the Tell us your story about how you use data from Community Survey if you American Community the American [/programs- surveys/acs/contact.html] [/programs- surveys/acs/news/email- updates.html] [/programs-surveys/acs/share- your-acs-data-story.html] Page Last Revised - August 28, 2024