Konrad I of Masovia, 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.

The House of Piast was the first historical ruling dynasty of Poland. The first documented Polish monarch was Duke Mieszko I. The Piasts' royal rule in Poland ended in 1370 with the death of King Casimir III the Great.