Largest Municipalities in Illinois by First Letter

Name the largest city beginning with each letter. Counties (or county equivalents) listed are where each municipality is primarily located for municipalities extending into neighboring county(s). If a letter is omitted, it means that there are no municipalities in the state beginning with that letter. Population numbers are 2025 estimates.

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Last updated: July 11, 2025

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First submitted	July 11, 2025
Times taken	10
Average score	53.8%
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First Letter	County	Population	Municipality
A	Kane	175,795	Aurora
B	McLean	78,521	Bloomington
C	Cook	2,611,867	Chicago
D	Macon	67,165	Decatur
E	Cook	112,438	Elgin
F	Stephenson	22,629	Freeport
G	Cook	45,811	Glenview
H	Cook	48,711	Hoffman Estates
I	DuPage	9,228	Itasca
J	Will	150,647	Joliet
K	Kankakee	23,168	Kankakee
L	DuPage	43,369	Lombard
M	Cook	52,701	Mount Prospect

First Letter	County	Population	Municipality
N	DuPage	150,795	Naperville
O	Cook	56,094	Orland Park
P	Peoria	108,870	Peoria
Q	Adams	38,398	Quincy
R	Winnebago	144,420	Rockford
S	Sangamon	111,374	Springfield
T	Cook	52,594	Tinley Park
U	Champaign	38,196	Urbana
V	Lake	26,579	Vernon Hills
W	Lake	86,657	Waukegan
X	Clay	366	Xenia
Y	Kendall	26,701	Yorkville
Z	Lake	23,926	Zion