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

Ansonia
Bridgeport
Cheshire
Danbury
East Hartford
Falls Village
Greenwich
Hartford
(no I)
Jewett City
Kensington
Long Hill
Meridan
New Haven
Orange
Putnam
Quinebaug
Riverside
Stamford
Torrington
(no U)
(no V)
Waterbury
(no X)
(no Y)
(no Z)