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] . 2018 On this page Vintage of Geographic Areas for ACS Estimates [#vintage-of-geographic-areas-for-acs-estimates] 2018 [#2018] Legal Areas [#legal-areas] Statistical Areas [#statistical-areas] You May Be Interested In [#you-may-be-interested-in] Legal Areas The Census Bureau annually conducts the Boundary and Annexation Survey (BAS) [/programs-surveys/bas.html]  to collect information about selected legally defined geographic areas. Summary Level Geographic Area Vintage of Geographic Area for 2018 ACS Estimate Year 040 050 State and State Equivalent County or equivalent (Alaska boroughs, Louisiana parishes, Puerto Rico municipios, independent cities) January 1, 2018 January 1, 2018 County Subdivision 067 Township, Minor Civil Division (MCD)/Barrio and Barrio-Pueblo January 1, 2018 Place 160 Incorporated Place January 1, 2018 American Indian/Alaska Native/Hawaiian Home Land 230 Alaska Native Regional Corporations (ANRCs) 2010 Census 250/252/254 Federal American Indian Reservation (federal AIR) January 1, 2018 250/252 State American Indian Reservation (state AIR) 251 American Indian Tribal Subdivision, federal AIR 250/254 Hawaiian Home Land (HHL) 2010 Census January 1, 2018 2010 Census Other Legal Areas 500 Congressional District, Delegate District DC, Resident Commissioner District January 1, 2018 1 [#par_textimage_0] PR 610/620 State Legislative Districts (Upper and Lower Chambers) 2018 Legislative Session Year [#ftn4] 950/960/970 School District (Elementary, Secondary, Unified) * [#par_textimage_5] 2017-2018, January 1, 2018 170 Consolidated City January 1, 2018 *School district boundaries [https://www.census.gov/did/www/schooldistricts/data/boundaries.html] are updated every two years as part of the School District Review Program. 1 116th Congress of the United States Statistical Areas For statistical areas, boundary changes are mostly associated with updates from each decennial census. Statistical areas are designed to have stable boundaries over time. Summar y Level Geographic Area Vintage of Geographic Area for 2018 ACS Estimate Year 050 County Equivalent (Census Areas in Alaska) January 1, 2018 County Subdivision 060 Census County Division (CCD) Place 160 Census Designated Place (CDP)/Zona Urbana and Comunidad American Indian/Alaska Native/Hawaiian Home Land 250/252 Tribal Designated Statistical Area (TDSA) 250/252 State Designated Tribal Statistical Area (SDTSA) 250/252 Oklahoma Tribal Statistical Area (OTSA) 251 256 American Indian Tribal Subdivision (within OTSA) Tribal Tract 258 Tribal Block Group 2010 Census** [#par_textimage_760032529] 2010 Census** [#par_textimage_760032529] 2010 Census 2010 Census 2010 Census 2010 Census 2010 Census** [#par_textimage_760032529] 2010 Census** [#par_textimage_760032529] 250/252 Alaska Native Village Statistical Area (ANVSA) 2010 Census Other Statistical Areas Metropolitan Statistical Area/Micropolitan Statistical Area August 15, 2017 Metropolitan Statistical Area/Micropolitan Statistical Area - Principal City [/programs- surveys/acs/geography-acs/geography-boundaries-by-year/20161.html#par_textimage_8] August 15, 2017* [#par_textimage_8] New England City and Town Area (NECTA) August 15, 2017 New England City and Town Area - Principal City August 15, 2017* [#par_textimage_8] 310 312 350 352 400 140 Urban Area Census Tract 150 Census Block Group 795 860 Public Use Microdata Area (PUMA) 5-digit ZIP Code Tabulation Area (ZCTA) 2010 Census 2010 Census** [#par_textimage_760032529] 2010 Census** [#par_textimage_760032529] 2010 Census 2010 Census * 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. **Changes to the boundaries of legal areas may cause complementary changes to the boundaries of selected statistical areas. 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 Sign up to receive email Tell us your story about the American Community Survey if you updates about the American Community how you use data from 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