|Member of the New York Senate|
from the 23rd district
January 1, 1915 – December 31, 1918
|Preceded by||George A. Blauvelt|
|Succeeded by||John J. Dunnigan|
|1st Borough President of Staten Island|
January 1, 1898 – December 31, 1913
|Preceded by||None (office created)|
|Succeeded by||Charles J. McCormack|
|Member of the New York State Assembly from Richmond County|
January 1, 1888 – December 31, 1888
|Preceded by||Edward A. Moore|
|Succeeded by||Hubbard R. Yetman|
July 3, 1860
Brooklyn, New York, U.S.
|Died||September 17, 1934 (aged 74)|
Staten Island, New York, U.S.
|Spouse(s)||Hermine de Rouville|
|Alma mater||Brooklyn Polytechnic Institute|
Columbia Law School
He was the son of Henry Bowman Cromwell, founder of the Cromwell Shipping Line, and Sarah (Seaman) Cromwell. He attended Brooklyn Polytechnic Institute, and graduated from Yale College in 1883. He graduated from Columbia Law School in 1886, and practiced law with the firm of Elihu Root until 1889. He was a member of the New York State Assembly (Richmond County) in 1888.
After the consolidation of New York City, he was elected the first Borough President of Richmond in a very close and contested election, with a margin of only six votes, that was decided by the New York State Court of Appeals. He was elected three times, and served from 1898 to 1913.
He was a member of the New York State Senate (23rd D.) from 1915 to 1918, sitting in the 138th, 139th, 140th and 141st New York State Legislatures. He declined to run for re-election in 1918. On June 1, 1915, in his first senate term, he married Hermine de Rouville, a member of the noted Hertel de Rouville family of Quebec. They had no children.
- "George Cromwell Dead at Age of 74". New York Times. September 18, 1934. p. 21. Retrieved March 1, 2019.
- Bulletin of Yale University – Obituary Record of Graduates of Yale University Deceased During the Year 1934–1935 (PDF). p. 47. Retrieved March 1, 2019.
- Lundrigan, Margaret (2004). Staten Island: Isle of the Bay. Arcadia Publishing. p. 111. ISBN 0-7385-2443-3.
- "Cromwell Drops Politics" (PDF). New York Times. August 4, 1918. Retrieved March 1, 2019.
- "June Comes With a Trail of Brides – Cromwell—de Rouville" (PDF). New York Times. June 2, 1915. Retrieved March 1, 2019.
- Official New York from Cleveland to Hughes by Charles Elliott Fitch (Hurd Publishing Co., New York and Buffalo, 1911, vol. IV, p. 324)
- Cromwell Put on the Fusion Slate in The New York Times on September 29, 1909
|New York Assembly|
Edward A. Moore
| New York State Assembly
Hubbard R. Yetman
| Borough President of Richmond
Charles J. McCormack
|New York State Senate|
George A. Blauvelt
| New York State Senate
John J. Dunnigan