Muara Jawa is a district in Kutai Kartanegara Regency, East Kalimantan, Indonesia.

As of 2023, it was inhabited by 44,070 people, and currently has the total area of 619.16 km2.

Its district seat is located at the village of Muara Jawa Ulu.

[1] The district borders Sanga-Sanga to the north, Loa Janan to the east, and Samboja to the south.

From 24 April 1969[3] until 21 October 1987,[4] along with Sanga-Sanga and Samboja, Muara Jawa belonged to Samarinda, until these districts were returned to Kutai that date.