Achampudur is a panchayat town in Tirunelveli district in the Indian state of Tamil Nadu.
As of 2001 India census, Achampudur had a population of 12,407. Males constitute 52% of the population and females 48%. Achampudur has an average literacy rate of 64%, higher than the national average of 59.5%; with 60% of the males and 40% of females literate. 10% of the population is under 6 years of age.