After several decades of public service, residents knew him as "Mr. Monmouth County".
[1] He was born on February 13, 1904, in Red Bank, New Jersey, to Charles P. Irwin.
[2] In 1936, he was elected to the State Assembly, where he served two, one-year terms.
[1] In 1938, Irwin was elected to the Board of Chosen Freeholders; he would serve twelve, three-year terms.
[3] In the Democratic landslide of the 1974 general election, Joseph C. Irwin was defeated for a thirteenth term.