Two Rivers: Literally meaning "Two Rivers," Erhshui is situated on a long neck of land between Pakua Mountain in the northeast and the Choshui River in the southwest, and covers a land area of 29 square kilometers.
二水鄉是彰化縣最南端的一個鄉，東北枕八卦山脈，西南臨濁水溪流，背山面水，地形狹長，總面積二九．四四平方公里。