Guanaba is a semi-rural locality in the City of Gold Coast, Queensland, Australia. In the 2021 census, Guanaba had a population of 852 people.

In the 2011 census, Guanaba recorded a population of 798 people, 49.6% female and 50.4% male. The median age of the Guanaba population was 43 years, 6 years above the national median of 37. 74.1% of people living in Guanaba were born in Australia. The other top responses for country of birth were England 7.5%, New Zealand 4.6%, Netherlands 1.5%, Germany 1.3%, Ireland 0.9%. 91.7% of people spoke only English at home; the next most common languages were 1% Mandarin, 0.8% Dutch, 0.6% German, 0.4% French, 0.4% Greek.