Hyder Ali came to power in about the year 1750 AD. During this period, it was a history of power struggle between Hyder Ali and later Tippu, with the British. Namakkal was held by Killdhar (Caption) of Hyder Ali until it was captured by British in 1768. For a brief period during late 18th and early 19th century Namakkal was under Tiruchirappalli district of British Rule. Later Namakkal was transferred back to Salem District. Then at 01-01-1997 finally announced as a separate district from Salem District.