Which current senators and representatives are naturalized US citizens?
Executive summary
At least one sitting U.S. senator is a naturalized citizen — Senator Mazie Hirono of Hawaii is identified as the lone naturalized senator in recent counts [1]. The House list of foreign‑born members in the 119th Congress includes multiple representatives who were born abroad; an official clerk’s roster dated December 1, 2025, names foreign birthplaces for members such as Becca Balint (Germany) and Don Beyer (Free Territory of Trieste), indicating they are foreign‑born and thus may be naturalized or citizens at birth depending on parentage [2].
1. Who in Congress can be naturalized — and why it matters
The Constitution requires only U.S. citizenship, plus age and residency thresholds, for members of the House and Senate; senators must be 30 years old and U.S. citizens for nine years, representatives must be 25 and citizens for seven years [3]. That legal framework means naturalized citizens are eligible for both chambers; historical and contemporary counts show foreign‑born Americans do serve in Congress [4] [5].
2. The Senate’s known naturalized member
Public compendia and data summaries identify Mazie Keiko Hirono of Hawaii as the “lone naturalized Senator” in recent Congresses, a fact used in statistical briefings about immigrant representation [1]. Available sources do not list other current senators explicitly as naturalized citizens; official Senate materials list foreign‑born senators historically but the specific current roster of naturalizations beyond Hirono is not detailed in the supplied snippets [4] [1].
3. Foreign‑born membership in the House: an official roster
The House Clerk’s compiled PDF of “Foreign‑Born in the UNITED STATES HOUSE OF REPRESENTATIVES” for the 119th Congress (dated December 1, 2025) enumerates representatives and their places of birth — for example, Becca Balint (born in Germany) and Donald S. Beyer Jr. (born in the Free Territory of Trieste) — confirming multiple foreign‑born members in the current House [2]. The roster shows who was born abroad but does not, in the excerpts provided, distinguish between those who were U.S. citizens at birth versus those who became citizens through naturalization; that distinction requires individual biographical details not contained in the clipped list [2].
4. How many naturalized members has Congress had — and past estimates
Analysts from media and research organizations have repeatedly counted dozens of foreign‑born members in recent Congresses. For example, Voice of America reported that 18 members of the 117th Congress were born outside the United States and “became U.S. citizens through naturalization,” illustrating that naturalized members are a measurable share of Congress [6]. Statista’s charting of the 117th Congress likewise singled out Hirono as the lone naturalized senator at that time and listed several foreign‑born House members [1].
5. Limits of available reporting and what’s not in these sources
The documents provided identify foreign birthplaces and note that foreign‑born lawmakers serve in Congress, but they do not supply a complete, labeled roster today of which members specifically acquired citizenship by naturalization versus those born abroad to U.S. parents (citizens at birth) or who derived citizenship as minors [2] [7]. Available sources do not mention a comprehensive, up‑to‑date list naming every current senator and representative who is a naturalized U.S. citizen; confirmation of naturalization status for each member requires consulting individual biographical records or official member statements, which are not included in the supplied excerpts [2] [1].
6. Competing viewpoints and political context
Observers frame foreign‑born membership in two different ways: one view treats naturalized members as proof of immigrant integration and democratic inclusivity, citing the substantial number of naturalized citizens in Congress [6]. Another line of political debate—illustrated by recent legislative proposals and commentary—raises concerns about dual citizenship and questions about loyalty, prompting bills like the “Exclusive Citizenship Act” and public discussion of dual‑citizenship rules for officials [8]. Those proposals do not change the constitutional eligibility rules for Congress but underscore how representation of naturalized Americans can become a flashpoint [3] [8].
7. Bottom line for the original question
Confirmed by the supplied sources: at least one sitting senator, Mazie Keiko Hirono, is identified as a naturalized senator [1]. The House Clerk’s December 1, 2025, roster documents multiple foreign‑born representatives but does not, in the provided text, label which of those members became U.S. citizens by naturalization versus by birthright or derivation [2]. A definitive, chamber‑wide inventory of current naturalized members is not found in the supplied reporting and would require checking individual member bios or an annotated official list not present in these sources [2] [1].