Contents
How often do census boundaries change?
every 10 years
The Census Bureau conducts a new census every 10 years.
How often do census blocks change?
For example, a block centroid contains the same information as the block polygon. The Census Bureau conducts a new census every 10 years. The latest one was conducted in 2020.
How many census blocks does the US have?
11,078,297
National Geographic Tallies
| Geographic Entities | United States |
|---|---|
| Census Blocks | 11,078,297 |
| Census Tracts | 73,057 |
| Counties & Equivalents | 3,143 |
| County Subdivisions | 35,703 |
What is the shape of a cartographic boundary file?
Cartographic Boundary Files – Shapefile The cartographic boundary files are simplified representations of selected geographic areas from the Census Bureau’s MAF/TIGER geographic database. These boundary files are specifically designed for small scale thematic mapping. The cartographic boundary files are available in shapefile and KML format.
What are the different types of Boundary Files?
These boundary files are specifically designed for small scale thematic mapping. As of 2019, cartographic boundary files are available in shapefile, geodatabase, and KML format. For more details about these files, including their appropriate usage, please see our Cartographic Boundary File Description page.
Where can I find demographic data for census?
The core TIGER/Line Files and Shapefiles do not include demographic data, but they do contain geographic entity codes (GEOIDs) that can be linked to the Census Bureau’s demographic data, available on data.census.gov. All legal boundaries and names are as of January 1, 2020.
When do the 2020 census boundaries come out?
All legal boundaries and names are as of January 1, 2020. Released February 2, 2021. User note on Congressional and State Legislative Districts in Geographic Products. The 2020 Census Redistricting Data (P.L. 94-171) Shapefiles are available for all 50 states, the District of Columbia, and the Commonwealth of Puerto Rico.