38th Cavalry may refer to:
38th Cavalry Regiment (United States) 38th Mississippi Infantry Regiment, sometimes (inaccurately) referred to as the 38th Mississippi Cavalry Regiment 38th Regiment Central India Horse, British India 38th (High Wycombe) Company, Imperial Yeomanry
See also 38th Division (disambiguation) 38th Brigade (disambiguation) 38th Regiment (disambiguation) 38th (disambiguation)