Zakroczym ([zaˈkrɔt͡ʂɨm]; Yiddish: זאקראטשין Zakrotshin) is a small town in the Masovian Voivodeship, Poland.

Zakroczym has a long and rich history: in the Kingdom of Poland and the Polish–Lithuanian Commonwealth, it was the capital of an administrative unit (ziemia), part of Mazovian Voivodeship.

The name of Zakroczym comes from ancient Polish word zakrot, which means river crossing.

Originally, the town was located closer to the Vistula river, and was called Kroczym or Kroczyn.

Cherry products such as podchmielone wisienki zakroczymskie (cherries covered with syrup and spirit) and konfitura wiśniowa zakroczymska (a local type of traditional Polish cherry jam) are officially protected traditional foods of Zakroczym, as designated by the Ministry of Agriculture and Rural Development of Poland.