Ilanji is a panchayat town in Tenkasi district, in the Indian state of Tamil Nadu.

[citation needed] In the 2001 Indian census,[2] Ilanji reported a population of 9,423.

I.S Sethuramalingam Pillai, Late Headmaster, Ilanji Ramaswamy Pillai High School, was a recipient of the Tamil Nadu State Government's "Nalla Aasiriyar Virudhu" (Best Teacher Award, 1970).

Eswara Konar is a farmer who was also well known for his rheumatoid arthritis treatment (Siddha medicine|Siddha medical system).Land lord P. Nallakannu chettiar is a prominent farmer who was well known for his agricultural activities and innovative cultivation of new crops.

Deivengaperumal has pioneered the meals programme which facilitates provision of ready-to-eat food at the doorsteps of many senior citizens in the area.

Tourist spots in the area include Courtallam (located near to the Ilanji) and Five Falls.