Sihu may refer to:
Sihu (instrument), Chinese bowed string instrument Four hu, a way of classifying Chinese syllable finals Sihu, Jiangsu (四户镇), town in Pizhou City, Jiangsu, PR China Sihu, Changhua (溪湖鎮), or Xihu, town in Changhua County, Taiwan Sihu, Miaoli (西湖鄉), or Xihu, township in Miaoli County, Taiwan Sihu, Yunlin (四湖鄉), township in Yunlin County, Taiwan