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
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