The River Anton is a chalk stream in Hampshire in south east England. It rises in Andover and flows southwards for approximately 8 miles (13 km) to meet the River Test near Chilbolton. The principal tributary of the Anton, the Pillhill Brook, joins the river at Upper Clatford.

Andover is a town in the Test Valley district of Hampshire, England. The town is on the River Anton, a major tributary of the Test, and lies alongside the major A303 trunk road at the eastern end of Salisbury Plain, 18 miles (29 km) west of the town of Basingstoke. It is 14 miles (23 km) from Winchester, 35 miles (56 km) north of Southampton and 65 miles (105 km) from London.