The alphamegalog of the cities of Hawaii lists the largest city in Hawaii for each letter of the alphabet. In this case, ‘largest’ is based on population within the city proper.

Aiea
Black Sands
Captain Cook
Discovery Harbor
East Honolulu
Fern Acres
(no G)
Honolulu
Iroquois Point
(no J)
Kaneohe
Lahaina
Mililani
Nanakuli
Ocean Point
Pearl City
(no Q)
Royal Kunia
Schofield Barracks
Tiki Gardens
Ualapue
Volcano
Waipahu
(no X)
(no Y)
(no Z)