Ksawery Faustyn Ignacy Zakrzewski (15 February 1876 in Welna [now Goslinowo] – 18 November 1915 in Poznan) was a Polish physician, independence activist, director of Poznan's Polish Gymnastic Society "Falcon", co-editor of biweekly magazine Sokól, co-founder (with Marian Seyda) of magazine Kurier Poznanski.
According to Bernard Chrzanowski, Zakrzewski was an initiator and co-creator of scouting in Greater Poland.
He was one of the main organiser of Polish scouting in the Prussian partition of Poland.