Mueang Ranong () is the capital district (amphoe mueang) of Ranong province, in southern Thailand.
Neighboring districts are (from the north clockwise) La-un of Ranong Province, Phato of Chumphon province, and Kapoe of Ranong. To the west across the Kraburi River estuary is the Tanintharyi Division of Myanmar.
The district is divided into nine subdistricts (tambons), which are further subdivided into 38 villages (muban).
As of December 2023 there are two town municipalities (thesaban mueang), Ranong covers subdistrict Khao Niwet, while Bang Rin covers the whole subdistrict. Five subdistrict municipalities (thesaban tambon): Ngao, Pak Nam and Pak Nam Tha Ruea cover parts of the subdistricts Ngao and Pak Nam, while Bang Non and Ratchakrut cover the whole subdistrict. There are four subdistrict administrative organizations - SAO (ongkan borihan suan tambon - o bo to): Ngao covers part of the subdistrict and Sai Daeng, Hat Som Paen and Koh Phayam cover the whole subdistricts.
There is general hospital in Ranong with 300 beds.
There are total sixteen health-promoting hospitals in the district, of which; one in Bang Non and Sai Daeng and two in Ratchakrut, Ngao, Bang Rin, Hat Som Paen and Ko Phayam and four in Pak Nam.
Some people are fishermen or work in the fourteen fish and seafood processing factories:<br> One in Khao Niwet and Ngao, two in Pak Nam and Bang Non and eight in Bang Rin. Others work in the many food stalls, or family-owned restaurants.
There are sixteen Theravada Buddhist temples in the district.<br> One in Ngao, Pak Nam, Bang Non and Sai Daeng, two in Khao Niwet, Bang Rin, Hat Som Paen and Koh Phayam, four in Ratchakrut.