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

American Fork
Bountiful
Cottonwood Heights
Draper
Eagle Mountain
Farmington
Grantsville
Holladay
Ivins
Jensen
Kearns
Layton
Millcreek
North Ogden
Orem
Provo
(no Q)
Riverton
Salt Lake City
Taylorsville
Uintah
Vernal
West Valley City
(no X)
(no Y)
(no Z)