Bad Axe River
 The Bad Axe River is a 4.2-mile-long (6.8 km) tributary of the Mississippi River in southwestern Wisconsin in the United States. Bad axe is a translation from the French la mauvaise hache but the origin of the name is unknown. The river's mouth at the Mississippi was the site of the Battle of Bad Axe an 1832 U.S. Army massacre of Sac and Fox Indians at the end of the Black Hawk War.