Ambur is a state assembly constituency in Tirupattur district in Tamil Nadu, India. Its State Assembly Constituency number is 48. It comprises portions of the Vellore and Vaniyambadi taluks and is a part of the Vellore constituency for national elections to the Parliament of India. It was in existence from 1957 to 1971 state elections. It is one of the 234 State Legislative Assembly Constituencies in Tamil Nadu, in India.