| Martin W. Deyo | |
| State Senate: | New York |
| District: | 40th |
| Term Start: | 1935 |
| Term End: | 1936 |
| State Assembly2: | New York |
| District2: | Broome County, 2nd |
| Term Start2: | 1933 |
| Term End2: | 1934 |
| Birth Name: | Martin Weld Deyo |
| Birth Date: | 12 December 1902 |
| Birth Place: | Binghamton, New York, U.S. |
| Resting Place: | Floral Park Cemetery Johnson City, New York, U.S. |
Martin Weld Deyo (December 12, 1902 – October 20, 1951) was an American lawyer and politician from New York.
He was born on December 12, 1902, in Binghamton, Broome County, New York, the son of Assemblyman Israel T. Deyo (1854–1953)[1] and Edith Austin (Weld) Deyo (1863–1944). He attended Binghamton Central High School, and graduated from Amherst College in 1925.[2] In 1928, he married Amy G. Sleeper (1902–1975). He graduated from Columbia Law School, was admitted to the bar in 1931, and practiced in Binghamton.
Deyo was a member of the New York State Assembly (Broome Co., 2nd D.) in 1933 and 1934; and a member of the New York State Senate (40th D.) in 1935 and 1936. In 1935, he introduced a bill in the Legislature to sterilize mentally defective people.[3]
He was a delegate to the New York State Constitutional Convention of 1938.
He was a justice of the New York Supreme Court (6th D.) from 1940 until his death in 1951, and sat on the Appellate Division (3rd Dept.) from 1947 on.
He died on October 20, 1951;[4] and was buried at the Floral Park Cemetery in Johnson City.