Simplifying research by incorporating publicly available map data into Google Maps-based tools

Map Tools

The main interactive map tools, organized by primary topic. These maps can be customized using the mapBuilder tool found below each map.

Custom Map Tools

Create custom area maps and color-coded maps from U.S. ZIP Codes, U.S. Counties, points or lines

Ancestry / Research Tools

Specialized map and search tools useful for genealogy, historical research and present-day research


See counties as they were in every historical year since each state’s inception, overlaid on a present-day interactive map

Historical U.S. County Maps by State by Year

Get access to Ad-Free Fullscreen Map & Search tools

Plus, use mapBuilder to create custom maps using points, lines (routes), ZIP Codes or Counties

Learn More

Draw & measure on maps

Save maps to your account

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