Joseph C. Irwin (February 13, 1904 – October 31, 1987) was an American Republican Party politician from New Jersey, who served on the Red Bank, New Jersey Borough Council, as a member of the New Jersey General Assembly, and as a member of the Monmouth County, New Jersey Board of Chosen Freeholders. 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. He was elected to the Red Bank Borough Council in 1934.^[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. Irwin was chosen as Director of the Board for the years 1951 through 1974.^[3]

In the Democratic landslide of the 1974 general election, Joseph C. Irwin was defeated for a thirteenth term. He died on October 31, 1987, in Red Bank, New Jersey.^[1]

• List of Monmouth County Freeholder Directors