Explore 235 years of foreign-born representation in Congress and their birth countries' voting rights. Drag the slider or press play to travel through history.
Last updated: April 14, 2026
Modern Era2026
179118501900195020002026
32Foreign-born serving
26House members
6Senators
19Birth countries
21From “banned” countries
Party breakdown in 2026
Democrat 23
Republican 9
Birth countries in 2026
Color = voting policy. Circle size = member count.
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About this data
The US Constitution requires representatives to be US citizens for at least 7 years and senators for at least 9 years, but places no restriction on dual citizenship or birth country. This tracker maps all foreign-born members of Congress from 1791 to 2026, alongside each member's birth country voting rights policy for non-citizens.
Use the timeline above to explore how foreign-born representation has changed across 235 years of American history — from the Irish and Scottish immigrants of the early Republic to today's diverse Congress.