Charles E. Hallstrom (January 22, 1863[1] – May 6, 1949), nicknamed the "Swedish Wonder", was a Swedish Major League Baseball player who pitched one game for the 1885 Providence Grays of the National League.

[3] Hallstrom is the first of four Major League Baseball players born in Sweden.

[4] He was born in Jönköping, Sweden, and died in Chicago at the age of 86.

[2] He is interred at the All Saints Cemetery in Des Plaines, Illinois.

This biographical article relating to an American baseball pitcher born in the 1860s is a stub.