Early morning saw queues forming at some polling stations, and the Elections Department said technical issues with the e-registration system are being resolved.
As of 12pm, about 52 per cent of eligible voters had cast their votes.
As at 3pm, 2,004,961 Singaporeans – or about 74 per cent of the total number of eligible electors – had voted, said the Elections Department (ELD).
It added that voting was proceeding smoothly, with only a handful of the polling stations with short queues.
Polls opened at 8am and close at 8pm as Singaporeans vote for the Republic’s ninth president.