Yilan may refer to:
China Yilan County, Heilongjiang (依兰县), county of central Heilongjiang province, People's Republic of China Yilan Town, Heilongjiang (依兰镇), seat of Yilan County Yilan, Jilin (依兰镇), town in Yanji
Taiwan Yilan County, Taiwan (宜蘭縣), county in northeastern Taiwan Yilan County Constituency, a constituency in the Legislative Yuan since 2008 Yilan County Council Yilan City (宜蘭市), seat of Yilan County Yilan River (宜蘭河), river flowing through Yilan County
Turkey Yılankale, crusader castle Yılan Island, Mediterranean island in Turkey