Chauncey Brewer Sabin (August 6, 1824 – March 30, 1890) was a United States federal judge.
Born in Oneonta, New York, Sabin read law to enter the bar in 1846. He was in private practice in Albany, New York from 1846 to 1847, in Houston, Texas from 1847 to 1861, in New York City from 1863 to 1865, in Houston, Texas from 1865 to 1866, and in Washington, D.C., from 1866 to 1867. He was a judge on the Third Judicial District of Texas from 1867 to 1868. He was in private practice in Washington, D.C. from 1868 to 1870. He was a judge on the District Court of Texas, Galveston District in 1871. He was a City attorney of Galveston, Texas from 1872 to 1873. He was a Texas State Representative in 1873. He was a Postmaster, Galveston, Texas from 1874 to 1882. He was in private practice in Galveston, Texas from 1882 to 1884.
Sabin was a federal judge on the United States District Court for the Eastern District of Texas. Sabin was nominated by President Chester A. Arthur on March 25, 1884, to a seat vacated by Amos Morrill. He was confirmed by the United States Senate on April 5, 1884, and received his commission the same day. Sabin served in that capacity until March 30, 1890, due to his death.
He died in Galveston, Texas.