Majuro (; Marshallese: Mājro [mʲæzʲ(e)rˠo]) is the capital and largest city of the Marshall Islands. It is also a large coral atoll of 64 islands in the Pacific Ocean. It forms a legislative district of the Ratak (Sunrise) Chain of the Marshall Islands. The atoll has a land area of 9.7 square kilometers (3.7 sq mi) and encloses a lagoon of 295 square kilometers (114 sq mi). As with other atolls in the Marshall Islands, Majuro consists of narrow land masses. It has a tropical trade wind climate, with an average temperature of 27 °C (81 °F).

Majuro has been inhabited by humans for at least 2,000 years and was first settled by the Austronesian ancestors of the modern day Marshallese people. Majuro was the site of a Protestant mission and several copra trading stations in the 1870s, before the German Empire annexed the atoll as part of the German Protectorate of the Marshall Islands in 1885. The city was later under Japanese and American administration. After the Marshall Islands broke away from the Federated States of Micronesia in 1978 to form the Republic of the Marshall Islands, Majuro became the new country's capital and meeting place of the Nitijeļā, supplanting the former capital of Jaluit.

The main population center, Delap-Uliga-Djarrit (DUD), is made up of three contiguous motus and had a population of 23,156 people at the 2021 census. Majuro has a port, shopping district, and various hotels. Majuro has an international airport with scheduled international flights to Hawaii, the Federated States of Micronesia, Kiribati, Guam, Nauru, and flights to domestic destinations around the country. Its economy is primarily service sector-dominated.