Theodoric I | |
|---|---|
| Margrave of Lusatia | |
 | |
| Reign | 1156–1185 |
| Predecessor | Conrad, Margrave of Meissen |
| Successor | Dedi III |
| Born | ca. 1118 |
| Died | 9 February 1185 Petersberg |
| Noble family | House of Wettin |
| Spouse(s) | Dobroniega Ludgarda of Poland |
| Father | Conrad, Margrave of Meissen |
| Mother | Liutgard of Elchingen-Ravenstein |
Theodoric I (German: Dietrich von Landsberg; c. 1130 – 9 February 1185), a member of the House of Wettin, was Margrave of Lusatia from 1156 until his death.