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

Anchorage
Badger
College
Dillingham
Eielson AFB
Fairbanks
Gateway
Homer
Iliamna
Juneau
Knik Fairview
Lakes
Meadow Lakes
Nikiski
Old Harbor
Palmer
Quinhagak
Ridgeway
Sitka
Tanaina
Unalaska
Valdez
Wasilla
(no X)
Yakutat
(no Z)