According to the 2011 census, Oddanchatram had a population of 30,064 with a gender-ratio of 994 females for every 1,000 males, much above the national average of 929.

[2] A total of 2,676 were under the age of six, constituting 1,378 males and 1,298 females.

[1] As of 2016, 2,23,628 (1,10,979 Males, 1,12,643 Females & 6 Others) voters are in Oddanchatram Constituency.

[3] Oddanchatram elects one MLA to the legislative assembly of the State.

R. Sakkarapani from Dravida Munnetra Kazhagam party was elected as the MLA from 1996 to 2021 for consecutive 6 terms, from this state assembly constituency.