Allaippiddi or Allaipiddy (Tamil: அல்லைப்பிட்டி, Sinhala: අලපිටිය Alapitiya) is a village on Velanai Island off the coast of the Jaffna peninsula within Sri Lanka's Northern Province.

Allaipiddy is strategically located on the causeway from Jaffna towards islets of Velanai and Kayts through Pannai bridge.

After Mandaitivu, past the abandoned aluminium factory, lies a large Sri Lanka Navy garrison, 500 meters (1,600 ft) from Allaipiddy.

[1] Most residents of the village are Sri Lankan Tamils and the majority are Roman Catholics.

[2] At least 150 residents fled the village after the Allaipiddy massacre of May 13, 2006.