Yi'an (), is a town and the county seat of Yi'an County, Heilongjiang, China. It used to be called Tai’an (泰安), but was officially renamed in 1947 to Yi’an (依安) to avoid any possibility of confusion within the city of Tai'an (泰安) in Shandong Province (山東省). It is on the former Tsitsihar-Koshen railway about west of Bei'an.