Oval tube station in Kennington is a station on the Northern line of the London Underground. It is between Stockwell and Kennington stations. It is the only station on the Morden branch of the Northern line whose name begins with a vowel. It is one of only two stations on the London Underground with only four letters in its name. The other station is Bank. Oval station is in Travelcard Zone 2. It is named for The Oval, which it serves.