Jasieńczyk is a Polish coat of arms.

It was used by several szlachta families in the times of the Polish–Lithuanian Commonwealth.

Earliest version was Jasiona and had two keys in saltire.

A bearer of this coat of arms was Chancellor of the Exchequer - Treasurer of Poland, and the history of these arms is presumed to be attributable to ecclesiastical iconography.

Notable bearers of this coat of arms include: