The Seoul Metropolitan Government (Korean: 서울특별시청) is a local government of Seoul, South Korea. The mayor is elected to a four-year term by the citizens of Seoul and is responsible for the administration of the city government. The Seoul Metropolitan Government deals with administrative affairs as the capital city of South Korea. Hence, it is more centralized than that of most other cities, with the city government being responsible for correctional institutions, public education, libraries, public safety, recreational facilities, sanitation, water supply, and welfare services.

Seoul, officially Seoul Special City, is the capital of the Republic of Korea (ROK), commonly known as South Korea, and the country's most extensive urban center. The broader Seoul Capital Area, encompassing Gyeonggi province and Incheon metropolitan city, emerged as the world's fourth largest metropolitan economy in 2014, trailing only Tokyo, New York City, and Los Angeles, hosting more than half of South Korea's population. Although Seoul's population peaked at slightly over 10 million, it has gradually decreased since 2014, standing at approximately 9.97 million residents as of 2020. Seoul is the seat of the South Korean government.