Chuck Grassley

Chuck Grassley
Official portrait, 2017
President pro tempore of the United States Senate
Assumed office
January 3, 2025
Preceded byPatty Murray
In office
January 3, 2019 – January 20, 2021
Preceded byOrrin Hatch
Succeeded byPatrick Leahy
Chair of the Senate Judiciary Committee
Assumed office
January 3, 2025
Preceded byDick Durbin
In office
January 3, 2015 – January 3, 2019
Preceded byPatrick Leahy
Succeeded byLindsey Graham
United States Senator
from Iowa
Assumed office
January 3, 1981
Serving with Joni Ernst
Preceded byJohn Culver
Past Senate positions
President pro tempore emeritus of the United States Senate
In office
January 20, 2021 – January 3, 2025
Preceded byPatrick Leahy
Succeeded byPatty Murray
Chair of the Senate Finance Committee
In office
January 3, 2019 – February 3, 2021
Preceded byOrrin Hatch
Succeeded byRon Wyden
In office
January 3, 2003 – January 3, 2007
Preceded byMax Baucus
Succeeded byMax Baucus
In office
January 20, 2001 – June 6, 2001
Preceded byMax Baucus
Succeeded byMax Baucus
Chair of the Senate Narcotics Caucus
In office
January 3, 2015 – January 3, 2019
Preceded byDianne Feinstein
Succeeded byJohn Cornyn
Chair of the Senate Aging Committee
In office
January 3, 1997 – January 3, 2001
Preceded byWilliam Cohen
Succeeded byJohn Breaux
Member of the U.S. House of Representatives
from Iowa's 3rd district
In office
January 3, 1975 – January 3, 1981
Preceded byH. R. Gross
Succeeded byCooper Evans
Member of the Iowa House of Representatives
In office
January 12, 1959 – January 3, 1975
Preceded byWayne Ballhagen
Succeeded byRaymond Lageschulte
Constituency
Personal details
BornCharles Ernest Grassley
(1933-09-17) September 17, 1933
PartyRepublican
Spouse
Barbara Speicher
(m. 1954)
Children5
RelativesPat Grassley (grandson)
EducationUniversity of Northern Iowa (BA, MA)
University of Iowa
Signature
WebsiteSenate website
Campaign website

Charles Ernest Grassley (born September 17, 1933) is an American politician serving since 2025 as the president pro tempore of the United States Senate, a position he also held from 2019 to 2021. A member of the Republican Party, Grassley is the senior U.S. senator from Iowa, serving since 1981.

Before becoming a senator, Grassley served eight terms in the Iowa House of Representatives (1959–1975) and three terms in the United States House of Representatives (1975–1981). He served three stints as Senate Finance Committee chairman during periods of Republican Senate majority. Upon the retirement of Orrin Hatch on January 3, 2019, Grassley became the Senate's most senior Republican and its president pro tempore. Upon Patrick Leahy's retirement in January 2023, Grassley became the dean of the Senate.

At 92 years, 5 months and 27 days old, Grassley is the oldest sitting United States senator, the longest-serving Republican in congressional history, and the sixth-longest-serving U.S. senator in history. He served as president pro tempore emeritus of the Senate from 2021 to 2025. During his four decades in the Senate, Grassley has chaired the Finance Committee, the Narcotics Control Caucus, the Judiciary Committee, and the Aging Committee.