Jangan District (Korean: 장안구; RR: Jangan-gu), established on July 1, 1988, is the northern district of the city of Suwon in Gyeonggi Province, South Korea.

Jangan District's northern border, with Yongin, is the mountain of Gwanggyosan.

Most of the streams passing through Suwon originate in Jangan District, on Gwanggyosan or other nearby peaks.

Since Suwon is bounded to the east by other hills, the streams, chiefly the Suwoncheon, flow southwards through the city, eventually emptying into the Yellow Sea at Asan Bay.

Jangan District is home to Suwon Civil Stadium, a multi-purpose sports complex which hosted the handball events of the 1988 Summer Olympics, and which is now home to KT Wiz baseball team and Suwon FC football team.