The D Line is a fully underground 5.1-mile (8.2 km) rapid transit line operating in Los Angeles, running between Koreatown and Downtown Los Angeles. It is one of six lines on the Metro Rail system, operated by the Los Angeles County Metropolitan Transportation Authority.

Wilshire/Vermont station is an underground rapid transit station on the B Line and D Line of the Los Angeles Metro Rail system. The station is located near the intersection of Wilshire Boulevard and Vermont Avenue, after which the station is named, in the Los Angeles neighborhood of Koreatown. Unlike the other stations on Wilshire or Vermont which were built directly under the street, this station is offset on a diagonal between the two streets, allowing the lines to diverge without trains on one line having to slow for a tight turn. The station has a unique layout with two side platforms on two levels, necessitated by the flying junction between the lines just west of the station. It is the last station going from Union Station that serves both the B Line and D Line.