27 or USS S.C. 27, was an SC-1-class submarine chaser built for the United States Navy during World War I.

The U.S. Navy adopted its modern hull number system on 17 July 1920, after Submarine Chaser No.

Had she remained in Navy service at that date, she would have been classified as SC-27 and her name would have been shortened to USS SC-27, and she now is referred to retrospectively by this name.

The Coast Guard found Richards, like other SC-1-class submarine chasers, too expensive to operate and maintain, and sold her on 29 January 1923.

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