31st Reconnaissance Squadron

31st Reconnaissance Squadron may refer to:
 * The 31st Reconnaissance Squadron (Heavy), active from 3 February 1942 to 16 March 1942 at Pendleton Field, Oregon and Gowen Field, Idaho and assigned to the 303d Bombardment Group.
 * The 31st Tactical Reconnaissance Squadron, designated the 31st Reconnaissance Squadron (Fighter) from April 1943 to August 1943.
 * The 33d Network Warfare Squadron, designated the 31st Reconnaissance Squadron (Night Photographic) from September 1947 to November 1947.
 * The 31st Test and Evaluation Squadron, designated the 31st Reconnaissance Squadron, Very Long Range (Photographic) and 31st Reconnaissance Squadron, Very Long Range (Photographic - Radio Countermeasures) from October 1947 to June 1949.