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State Demography Office

The primary source for Colorado population and demographic information

The State Demography Office provides population estimates and forecasts for Colorado’s regions, counties, and municipalities developed by the State Demography Office and the U.S. Census Bureau.

You can access data visualizations, data spreadsheets, data lookup applications, data spreadsheets, data links, and technical documentation by topic or geography by clicking on one of the buttons on the left.

Accessibility Statement

The State Demography Office wants to ensure everyone is able to access the information they need. If you feel this site is not accessible to you, please click on the "Contact SDO" button below and we will be happy to assist you.

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County Net Migration by Age Data Lookup

Need State/Regional Data?

INSTRUCTIONS:

This application creates custom tables for SDO County estimates for Net Migration by 5-year age groups from 1970-1980 to 2010-2020.

A spreadsheet with detailed information for counties is available on the SDO Population Spreadsheets page.