Diwan is a coastal locality in the Shire of Douglas, Queensland, Australia. In the , Diwan had a population of 169 people.
The locality is partly bounded by Cape Tribulation Road to the north, by Alexandra Bay (within the Coral Sea, ) to the east, and by Hutchinson Creek to the south.
Most of Diwan is within the Daintree National Park.
Alexandra Bay State School opened on 1 June 1986.
The locality was named and bounded on 8 September 2000.
In the , Diwan had a population of 153 people.
In the , Diwan had a population of 169 people.
Alexandra Bay State School is a government primary (Early Childhood-6) school for boys and girls at Lot 1 Cape Tribulation Road (). In 2017, the school had an enrolment of 31 students with 3 teachers and 6 non-teaching staff (3 full-time equivalent). In 2018, the school had an enrolment of 27 students with 3 teachers and 6 non-teaching staff (3 full-time equivalent).
There is no secondary school in Diwan. The nearest government secondary school is Mossman State High School in Mossman to the south.