The Moscow City Duma (Russian: Московская городская дума, romanized: Moskovskaya gorodskaya duma, commonly abbreviated to Мосгордума, Mosgorduma) is the regional parliament (city duma) of Moscow, a federal subject and the capital city of Russia.

In 1917, the Mossoviet was established as a parallel administration in the city following the February Revolution.

In 1993, following a presidential decree, the Moscow City Duma was re-established.

The Moscow City Duma consists of 45 deputies who are elected for five-year terms from single-member districts.

From 2005 to 2009, 20 deputies were elected on party lists, and 15 from single-seat districts.