Erlang Township (simplified Chinese: 二郎乡; traditional Chinese: 二郎鄉; pinyin: Èrláng Xiāng) is a township of Cheng County, Gansu province, China. As of 2023, it administers the following ten villages:
Tanhe Village (谭河村)
Zhuangzi Village (庄子村)
Dianzi Village (店子村)
Wuba Village (武坝村)
Zhaoba Village (赵坝村)
Yabei Village (崖背村)
Yanhe Village (严河村)
Liuping Village (刘坪村)
Anzi Village (安子村)
Caoyin Village (曹阴村)