A by-election for Kaindi constituency was held in the Territory of Papua and New Guinea between 16 July and 15 August 1966.
In the 1964 general election, the Kaindi seat had been contested by nine candidates. Bill Bloomfield, having run a tactical campaign to earn voters' second preferences, was elected on the eighth count. However, Bloomfield died in February 1966, becoming the first Papua New Guinean politician to die in office.
Five candidates registered to contest the election:
Pacific Islands Monthly reported that the election was expected to be a contest between Omas-Genora and Voutas.
90 polling stations were set up for the by-election, overseen by eight teams of electoral officials. A total of 28,588 voters were registered.
Voutas was elected on first preference votes, receiving 12,333 votes. Voter turnout was around 70%.