| Charles Patrick Gillen | |
| Order1: | 26th |
| Office1: | Mayor of Newark |
| Term Start1: | January 1, 1917 |
| Term End1: | January 1, 1921 |
| Predecessor1: | Thomas Lynch Raymond |
| Successor1: | Alexander Archibald |
| Birth Date: | 6 August 1876 |
| Birth Place: | County Roscommon, Ireland |
| Death Place: | Newark, New Jersey |
| Party: | Democratic |
Charles Patrick Gillen (August 6, 1876 – June 30, 1956) was the Democratic mayor of Newark, New Jersey, from 1917 to 1921. He was the first mayor under the reincorporation as a City Commission form of government.
He was born in County Roscommon, Ireland on August 6, 1876. He was the son of Thomas Gillen and Mary A. Conry. He was Irish Catholic.
He married Margaret Carey in 1923. He had a real estate business before entering politics. He was the mayor of Newark, New Jersey, from 1917 to 1921. He was a delegate to the 1932 Democratic National Convention.
He died on June 30, 1956, at Saint Michael's Medical Center in Newark, New Jersey, aged 79 and was buried at Mount Olivet Cemetery, Newark.[1]