Deputy Elections Commissioner R.M.A.L. Ratnayaka told Xinhua that 25 special polling stations were set up for people displaced in the war.
Over 38,000 public officials and 24,500 police personnel were deployed.
An estimated 1,600 local monitors were deployed along with four Commonwealth observers and 20 South Asian and Asian observers.
Diplomats from Canada, Germany and the US were also briefed ahead of the voting.
UN Secretary General Ban Ki-moon has urged all parties to work together after the elections to address the national and post-war agenda “constructively and collaboratively”.
Transparency International Sri Lanka said that over 500 complaints of election violations have been reported, with over 200 on abuse of state resources alone.