William Duer (U.S. Congressman)

William Duer
Member of the U.S. House of Representatives
from New York's 23rd district
In office
March 4, 1847 – March 3, 1851
Preceded byWilliam J. Hough
Succeeded byLeander Babcock
County Clerk of San Francisco, California
In office
October 1857 – October 1859
Preceded byThomas Hayes
Succeeded byWashington Bartlett
United States Consul to Valparaíso, Chile
In office
1851–1853
Preceded byZabdiel W. Potter
Succeeded byReuben Wood
District Attorney of Oswego County, New York
In office
1845–1847
Preceded byLeander Babcock
Succeeded byRansom H. Tyler
Member of the New York State Assembly from Oswego County
In office
January 1, 1840 – January 31, 1841
Serving with Peter Devendorf (1st term)
Edward B. Judson (2nd term)
Preceded bySamuel Hawley, Edward B. Judson
Succeeded byPeter Devendorf, Robert Kenyon
Personal details
Born(1805-03-25)March 25, 1805
New York City, New York
DiedAugust 25, 1879(1879-08-25) (aged 74)
New Brighton, Staten Island, New York
Resting placeSilver Mount Cemetery, Staten Island, New York
Political partyWhig (before 1860)
Constitutional Union (1860)
Democratic (after 1860)
EducationColumbia College
ProfessionAttorney

William Duer (March 25, 1805 – August 25, 1879) was an American lawyer and politician. In addition to serving in local offices in both California and New York, he represented New York in the United States House of Representatives from 1847 to 1851.

A native of New York City, Duer was a member of a family long prominent in New York politics and government. He graduated from Columbia College in 1824, studied law in New York City, and attained admission to the bar in 1828. After practicing in Oswego for two years, he returned to New York City, where he continued practicing law. After a brief residence in New Orleans, in 1835 he returned to Oswego, where he became active in politics and government as a Whig. He served in the New York State Assembly for two one-year terms (1840 and 1841) and was Oswego County's District Attorney from 1845 to 1847. In 1846, Duer was elected to the U.S. House. He was reelected in 1848 and served two terms, 1847 to 1851.

After leaving Congress, Duer served as U.S. Consul in Valparaíso, Chile for two years, then moved to San Francisco, where he practiced law and served as county clerk. In 1859 he returned to Oswego, where he was active in efforts to prevent the onset of the American Civil War. Once the conflict began, Duer supported the Union, but opposed the Republican Party and continued to advocate for concessions on the slavery and secession issues a way to end the war.

In retirement, Duer resided on Staten Island. He died there in 1879 and was buried at Silver Mount Cemetery.