Leninsky Avenue (Russian: Ле́нинский проспе́кт) is a major avenue in Moscow, Russia, that runs in the south-western direction between Kaluzhskaya Square in the central part of the city through Gagarin Square to the Moscow Ring Road. It is a part of the M3 highway which continues from Moscow to Kaluga and Bryansk to the border with Ukraine, and provides connections with Kiev and Odessa. It is also a part of the European route E101 connecting Moscow and Kiev. It is the second widest street in Moscow after Leningradsky Avenue. Its width varies between 108 and 120 metres.
Leninsky Avenue continues north beyond Kaluzhskaya Square as Yakimanka Street and southwest beyond the Ring Road as Kievskoye Highway. Oktyabrskaya and Leninsky Prospekt are the only two metro stations located at the avenue, the second one being named after the avenue itself. In late 2014, Troparyovo station is schedled to be open at the southern end of the avenue, at the intersection with Ostrovityanova Street.
The major intersections are with the Zhitnaya Street/Krymsky Val (Kaluzhskaya Square), Avenue of 60th Anniversary of October Revolution and Kosygina Street (Gagarin Square, where the avenue also crosses the Moscow Little Ring Railway and the Third Ring Road), Universitetsky Avenue, Lomonosovsky Avenue, Obrucheva Street/Lobachevskogo Street, as well as Vernadsky Avenue. In terms of the administrative division, Leninsky Avenue runs through Yakimanka, Gagarinsky, Lomonosovsky, Obruchevsky, Prospekt Vernadskogo, Tyoply Stan, and Troparyovo-Nikulino Districts.
In the vicinity are landmarks as such as Palace of Pioneers.