安山市（韩语：안산시／安山市）位于大韩民国京畿道的西南部。北侧是始兴市、南侧是华城市、东侧是军浦市。

2002年11月1日，分为二，成为檀园区及常绿区。

• 檀园区 (단원구)
• 常绿区 (상록구)

Ansan is a city in Gyeonggi Province, South Korea. It lies southwest of Seoul, and is part of the Seoul National Capital Area. It is connected to Seoul by rail via Seoul Subway Line 4. Ansan is situated on the Yellow Sea coast and some islands lie within its jurisdiction. The largest and best-known of these is Daebu Island. Several higher learning institutions are located in Ansan. They include Ansan University, Ansan College of Technology, Seoul Institute of the Arts, and the ERICA campus of Hanyang University. The Korea Transportation Safety Authority, a government agency, is also headquartered in Ansan on June 3, 2002. With its high number of foreign workers, Wongokbon-dong has been designated a multicultural area. On November 11, 2009, Ansan city hall became the first in South Korea to operate round-the-clock.