| Konrad I | |
|---|---|
 Konrad's effigy on a seal | |
| High Duke of Poland | |
| Reign | 1229–1232 |
| Predecessor | Władysław III Spindleshanks |
| Successor | Henry I the Bearded |
| Reign | 1241–1243 |
| Predecessor | Bolesław II Rogatka |
| Successor | Bolesław V the Chaste |
| Duke of Masovia | |
| Reign | 1194–1247 |
| Predecessor | Casimir II the Just Helen of Znojmo (regent) |
| Successor | Boleslaus I |
| Born | c. 1187/88 |
| Died | 31 August 1247 |
| Spouse | Agafia of Rus |
| Issue | Boleslaus I of Masovia Casimir I of Kuyavia Siemowit I of Masovia |
| House | House of Piast |
| Father | Casimir II the Just |
| Mother | Helen of Znojmo |
Konrad I of Masovia (ca. 1187/88[1] – 31 August 1247), from the Polish Piast dynasty, was the sixth Duke of Masovia and Kuyavia from 1194 until his death as well as High Duke of Poland from 1229 to 1232 and again from 1241 to 1243.
- ^ Jasiński 2001, p. 30-32.