Ansan is a city in Gyeonggi Province, South Korea. It lies south 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 coast of the Yellow Sea (locally called West Sea), at 37°19′N 126°50′E / 37.317°N 126.833°E / 37.317; 126.833. Portions of various Yellow Sea islands lie within its jurisdiction. The largest and best-known of these is Daebu Island.

Several institutions of higher learning are located in Ansan. They include Ansan College, Ansan College of Technology, Seoul Institute of the Arts, and a campus of Hanyang University.

The city is also home to National League soccer club Ansan Hallelujah.

The Korea Transportation Safety Authority, a government agency of South Korea, is headquartered in Ansan.

In 1986, several towns of Hwaseong county became incorporated, representing the beginning of Ansan as a city. With currently over 700,000 residents, Ansan now has 2 distinct and separate districts: Danwon, which counted 12 dongs as of 2009, and Sangnok, with 13.

The Chemical Brothers are a British electronic music duo composed of Tom Rowlands and Ed Simons. Originating in Manchester in 1991, along with The Prodigy, Fatboy Slim, The Crystal Method, and fellow acts, they were pioneers at bringing the big beat genre to the forefront of pop culture.

Ed Simons was born in Herne Hill, South London on 9 June 1970 to a barrister mother and a father who was not around much when Simons was growing up. Simons' two main interests when he was young were aeroplanes and musicals. Simons attended two South London public schools, Alleyn's School and Dulwich College. During his school years, he developed a fondness for rare groove and Hip hop music, having frequented a club called The Mud Club from the age of 14. By the time he left school, his two main musical interests were two Manchester bands, New Order and The Smiths. After finishing school with 11 O levels and three A-levels, he continued on to study history, especially late medieval history, at the University of Manchester.^{[citation needed]}