Anseongcheon (안성천, 安城川) is a stream that begins around the city of Yongin in the province of Gyeonggi-do, also flowing by the cities of Anseong and Pyeongtaek. It is 76 kilometres in length and has a watershed of 1,722 km2. Other tributaries include Jinwicheon (진위천, 振威川), Cheongnyongcheon (청룡천, 靑龍川), and Ipjangcheon (입장천, 笠場川).
