The U.S. Population Migration Data (IRS.gov) Migration data for the United States are based on year-to-year address changes reported on individual income tax returns filed with the IRS. They present migration patterns by State or by county for the entire United States and are available for inflows, the number of new residents who moved to a State or county and where they migrated from, and outflows, the number of residents leaving a State or county and where they went.
The U.S. Census Bureau's Migration Flows Mapper (census.gov) is a web mapping application intended to provide users with a simple interface to view and save county-to-county migration flows maps of the United States. The data are from the 2006-2010 through the 2015-2019 American Community Surveys.
Colorado & Counties
*Population totals and age by county, region and state were re-released March of 2021 after incorporating updated county birth, county death, and statewide net migration data and correcting an error which primarily impacted the older adult population in Colorado reducing its growth from 2019 to 2020 by approximately 3%.
The Components of Change for Colorado table is prepared annually by the State Demography Office. It shows estimated and forecasted births, deaths, natural increase and net migration for Colorado 1970 to 2025.
Births, Deaths, and Migration. This user defined lookup illustrates estimates and forecasts of births, deaths and net migration data as prepared annually by the State Demography Office for Colorado and counties 1970 to 2050.
Net Migration by Age Comparison: Interactive charts of net migration by 5 year age groups starting in 1995 through our current forecast.
The U.S. Census Bureau's Migration Flows Mapper (census.gov) is a web mapping application intended to provide users with a simple interface to view and save county-to-county migration flows maps of the United States. The data are from the 2006-2010 through the 2015-2019 American Community Surveys.
table is prepared annually by the State Demography Office. It shows estimated and forecasted births, deaths, natural increase and net migration for Colorado 1970 to 2025.