Sylvester J. Ryan (September 10, 1896 – April 10, 1981) was a United States district judge of the United States District Court for the Southern District of New York from 1947 to 1981 and its Chief Judge from 1959 to 1966.

Sylvester J. Ryan
New York Southern District Court
Chief Judge — U.S. District Court for the Southern District of New York
Born 1896 in New York, NY
Died 1981 in New York, NY
FJC ID: 2082
- Gender
- Male
- Race
- White
Prior employment
- Judicial Conference of the United StatesMember · 1959–1968
- Bronx County, New YorkChief assistant and acting district attorney · 1924–1947
- Private practice, New York City1918–1924
Appointments
1947–1981 · Appointed by Harry S Truman (Democratic)Term ended: Death
Education
- City College of New York
- CUNY City College
LL.B. · 1917