| John A. Lynch Sr. | |
| Office: | President of the New Jersey Senate |
| Term: | 1966 |
| Predecessor: | Charles W. Sandman |
| Successor: | Sido L. Ridolfi |
| Office1: | Member of the New Jersey Senate |
| Term Start1: | 1956 |
| Term End1: | March 3, 1978 |
| Successor1: | William J. Hamilton |
| Constituency1: | Middlesex (1956–1966) District 7 (1966–74) 17th district (1974–78) |
| Office2: | Mayor of New Brunswick |
| Term Start2: | 1951 |
| Term End2: | 1955 |
| Birth Date: | March 10, 1908 |
| Birth Place: | New Brunswick, New Jersey |
| Death Date: | March 3, 1978 (aged 69) |
| Death Place: | Queens, New York City, New York |
| Party: | Democratic |
| Predecessor1: | Bernard W. Vogel |
| Predecessor2: | Chester W. Paulus |
| Successor2: | Chester W. Paulus |
John A. Lynch Sr. (March 10, 1908 - March 3, 1978) was an American politician of the Democratic Party who served in the New Jersey Senate for 22 years, where he represented the 17th legislative District, and as mayor of New Brunswick, New Jersey from 1951 to 1955.
Lynch was born in New Brunswick, New Jersey, on March 10, 1908, to John T. Lynch and Margaret Corrigan. After graduating from St. Peter the Apostle High School in New Brunswick in 1925, he entered Fordham University. He transferred to Fordham University School of Law, graduating in 1929 with a Bachelor of Laws degree. He was admitted to the New Jersey bar in October 1929.[1] He clerked with New Jersey Supreme Court Justice Peter F. Daly and became a trial lawyer in New Brunswick.[2]
On October 13, 1934, Lynch married Evelyn Rooney, daughter of Joseph Rooney and Helen Ware. They had five children: Barbara Ann, John A. Lynch, Jr., William J., Mary-Lynn, and Gerald M. Lynch.[1] John A. Lynch, Jr. would also serve as State Senator and Mayor of New Brunswick.
From 1935 to 1941 he served as police recorder of the city of New Brunswick. He then served as prosecutor of pleas for Middlesex County from 1941 to 1946. In 1946 he was elected to the New Brunswick Board of Commissioners, and then became mayor in 1951, serving until 1955.[2]
In 1955 he was elected to the first of seven terms to the New Jersey Senate. In 1966 he was selected as Senate President, serving as Acting Governor in the absence of Governor Richard J. Hughes.[2]
Lynch continued to serve in the Senate while suffering from cancer in the last four years of his life. He died at Whitestone Hospital in Queens, New York City, on March 3, 1978, a week before his 70th birthday.[3]
The John A. Lynch Sr. Memorial Bridge, spanning the Raritan River on Route 18, is named in his honor.