Charles Sitgreaves (April 22, 1803, Easton, Pennsylvania – March 17, 1878, Phillipsburg, New Jersey) was an American Democratic Party politician who represented New Jersey's 3rd congressional district for two terms from 1865 to 1869.

Sitgreaves was born in Easton, Pennsylvania on April 22, 1803, and moved with his parents to New Jersey in 1806.

He studied law; was admitted to the bar in 1824 and commenced practice in Phillipsburg, New Jersey.

Sitgreaves was elected as a Democrat to the Thirty-ninth Congress and Fortieth Congress, and served in office from March 4, 1865 – March 3, 1869, and was not a candidate for renomination in 1868.

He died in Phillipsburg on March 17, 1878, and was interred in Seventh Street Cemetery in Easton.