Census 2020 CTData Hub
Feature-2020 Demographics and Housing Explorer
To explore data such as race/ethnicity, tenure, occupancy status, and more by town, within The 2020 Demographic and Housing Charateristics File (DHC), released by the U.S. Census Bureau in May 2023.
Census 2020 Redistricting Data Analysis
Here are some highlights of our Census 2020 Redistricting data analysis, and we have more in the works. You can find all of our analysis here. Check back often to see what’s new!
Map displaying the change in population by town in Connecticut between the 2010 Census and the 2020 Census.
How Diverse Is Connecticut? Explore Connecticut with The Diversity Index
Map of Diversity Index in Connecticut, 2020
Hartford lost population, Stamford became 2nd largest city in Connecticut
Connecticut Demographic Report
You will find CTData’s high-level findings, along with our full analyses of Census 2020 redistricting data.
Census 2020: Connecticut Population and Demographic Changes Map
Use this tool to explore the changes between the 2010 and 2020 census data by town. Note that some towns have may have larger percentage changes due to their small populations, or due to the impact of the new differential privacy protections.
Important Notes on Race and Ethnicity Data in the 2020 Census
Download Census 2020 Redistricting Data 📁
The redistricting dataset released on 12 August 2021 includes population counts (total, by race and Hispanic ethnicity, as well as voting-age population), and housing counts. This dataset does not include population counts by gender, income, or other variables.
First, second, and third most common race/ethnicity by census tract: comma-separated (.csv) or Excel (.xlsx)
For 8 counties: comma-separated (.csv) or Excel (.xlsx)
For 169 towns: comma-separated (.csv) or Excel (.xlsx)
For 883 census tracts: comma-separated (.csv) or Excel (.xlsx)
For 49,926 blocks (smallest available geography, quality may be affected by differential privacy): comma-separated (.csv) or Excel (.xlsx)
Census 2020 Geospatial Tools
2010 And 2020 Census Tracts → Town
Usually towns can be divided into tracts, but some towns in Connecticut are too small for even a single census tract (which averages 4,000 inhabitants) and have to share a tract with a neighboring town. Therefore, this many-to-one matching is approximate. https://github.com/CT-Data-Collaborative/ct-census-tract-to-town
2010 And 2020 Census BLOCKS → Town
Census blocks are the smallest geographical units for which census data is available. In 2010, there were 67,578 census blocks in Connecticut; but only 49,926 in 2020 Census. https://github.com/CT-Data-Collaborative/ct-census-block-to-town
See also What are census blocks? by Katy Rossiter
