John Crawford Crosby
Member of the U.S. House of Representatives from Massachusetts's 12th district
In office March 4, 1891 – March 3, 1893
Preceded by	Francis W. Rockwell
Succeeded by	Elijah A. Morse
Associate Justice of the Massachusetts Supreme Judicial Court
In office December 31, 1913 – October 1, 1937
Associate Justice of the Massachusetts Superior Court
In office January 25, 1905 – December 31, 1913
3rd Mayor of Pittsfield, Massachusetts
In office 1894–1895
Preceded by	Jabez L. Peck
Succeeded by	Walter F. Hawkins
Member of the Massachusetts Senate
In office 1888–1889
Member of the Massachusetts House of Representatives
In office 1886–1887
Personal details
Born	June 15, 1859 Sheffield, Massachusetts
Died	October 14, 1943(1943-10-14) (aged 84) Pittsfield, Massachusetts
Political party	Democratic
Alma mater	Eastman Business College Boston University School of Law
Profession	Lawyer

John Crawford Crosby (June 15, 1859 – October 14, 1943) was an American politician from the U.S. state of Massachusetts.

Crosby was born in Sheffield, Massachusetts. He attended the public schools of Pittsfield and graduated from Eastman Business College in Poughkeepsie, New York and from Boston University School of Law in Boston.

Crosby was admitted to the bar in 1882 and began practice in Pittsfield. He began his political career as a member of the school committee of Pittsfield from 1884 to 1890. During the later part of his service on the school committee, Crosby also served in the Massachusetts House of Representatives (1886–1887) and the Massachusetts Senate (1888–1889).

Crosby served as the director of a bank and later of fire and life insurance companies. He was elected in the 1890 election as a Democrat to the U.S. House of Representatives, representing Massachusetts's 12th district for the 52nd United States Congress (1891-03-04 to 1893-03-03).

Crosby lost his campaign for reelection in the 1892 election. He was elected Mayor of Pittsfield, serving from 1894 to 1895, and was a delegate to the 1896 Democratic National Convention.

Crosby was city solicitor from 1896 to 1900 and appointed a justice of the superior court on January 25, 1905, serving until December 31, 1913, when he was appointed justice of the Massachusetts Supreme Judicial Court. Crosby served on the court until his retirement on October 1, 1937. He died in Pittsfield on October 14, 1943, and was interred at Pittsfield Cemetery.

• 110th Massachusetts General Court (1889)

• United States Congress. "John Crawford Crosby (id: C000929)". Biographical Directory of the United States Congress.
• United States Government Printing Office (1600). United States congressional serial set. U.S. G.P.O. p. 5. john c crosby -wikipedia massachusetts.