Gajendrakumar Gangaser Ponnambalam (Tamil: கஜேந்திரகுமார் காங்கேசர் பொன்னம்பலம், romanized: Kajēntirakumār Kāṅkēcar Poṉṉampalam; born 16 January 1974) is a Sri Lankan lawyer, politician and Member of Parliament. He is the leader of the All Ceylon Tamil Congress, a member of the Tamil National People's Front.