| Leo I | |
|---|---|
| King of Ruthenia | |
| Reign | 1269–1301 |
| Predecessor | Daniel |
| Successor | Yuri I |
| Grand Prince of Kiev | |
| Reign | 1271–1301 |
| Predecessor | Yaroslav of Tver |
| Successor | Ivan-Volodymyr |
| Born | c. 1228 |
| Died | c. 1301 (aged c. 73) |
| Spouse | Constance of Hungary |
| Issue | Yuri I of Galicia Svyatoslava of Halych Anastasia of Galicia |
| House | Romanovichi |
| Father | Daniel of Galicia |
| Mother | Anna Mstyslavna Smolenska |
Leo I of Galicia (Ukrainian: Лев Дани́лович, romanized: Lev Danýlovych; c. 1228 – c. 1301) was King of Ruthenia, Prince of Belz (1245–1264), Peremyshl, Galicia (1264–1269), and Kiev (1271–1301).
He was a son of King Daniel of Galicia and his first wife, Anna Mstislavna Smolenskaia (daughter of Mstislav Mstislavich the Bold). As his father, Lev was a member of the senior branch of Vladimir II Monomakh descendants.[citation needed]