Oscar E. Carlstrom (July 16, 1878 – March 6, 1948) was an American lawyer.

Carlstrom was born on a farm near Aledo, Illinois and graduated from New Boston High School.

[1][2] He also served in Illinois Army National Guard with the 6th Illinois Infantry and the 123rd Field Artillery Regiment from November 26, 1916, to June 7, 1919, during World War I and was stationed in France for one year.

From 1925 to 1933, Carlstrom served as Illinois Attorney General.

In 1936, he ran unsuccessfully for the Republican nomination for governor.