Parliamentary elections were held in Guam in 1966.
The Democratic Party of Guam won all 21 seats in a "blackjack victory".
[1] The 21 members of the Legislature were elected from a single district, with the candidates receiving the most votes being elected.
[2] The Democratic Party campaign included attacks on the Territorial Party government for stopping the urban renewal programme, which was popular with voters.
[1] The Democratic Party won all 21 seats, with the Territorial Party left seatless after its top candidate received around 1,000 votes fewer than the lowest-ranked Democratic Party candidate.