Ossian Ray (December 13, 1835 – January 28, 1892) was a United States representative from New Hampshire.

Mr. Ray was admitted to the bar in 1857 and practiced in Essex and Coos counties.

For a short time, from February 22, 1879, until he resigned effective on December 23, 1880, Ray was the United States Attorney for the District of New Hampshire.

He was elected as a Republican to the Forty-sixth Congress to fill the vacancy caused by the death of Evarts W. Farr and was re-elected to the Forty-seventh and Forty-eighth Congresses, serving from January 8, 1881, to March 3, 1885.

Ossian Ray died in Lancaster, New Hampshire in 1892 and was buried in the Summer Street Cemetery.