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Southwest Illinois Cities
137 cities
City
Rank
County
2024 Pop.
Belleville
1
St. Clair County
40,212
O'Fallon
2
St. Clair County
31,855
Granite City
3
Madison County
26,705
Edwardsville
4
Madison County
26,663
Alton
5
Madison County
24,805
Collinsville
6
Madison County
23,596
Godfrey
7
Madison County
17,526
East St. Louis
8
St. Clair County
17,389
Cahokia Heights
9
16,869
Fairview Heights
10
St. Clair County
15,944
Shiloh
11
St. Clair County
14,944
Swansea
12
St. Clair County
14,512
Glen Carbon
13
Madison County
13,870
Troy
14
Madison County
11,295
Waterloo
15
Monroe County
11,190
Columbia
16
Monroe County
10,899
Wood River
17
Madison County
10,215
Highland
18
Madison County
9,935
Bethalto
19
Madison County
9,125
Mascoutah
20
St. Clair County
8,975
Maryville
21
Madison County
8,335
Jerseyville
22
Jersey County
8,243
Chester
23
Randolph County
6,706
Litchfield
24
Montgomery County
6,565
Pontoon Beach
25
Madison County
5,786
East Alton
26
Madison County
5,595
Carlinville
27
Macoupin County
5,479
Staunton
28
Macoupin County
4,919
Lebanon
29
St. Clair County
4,535
Freeburg
30
St. Clair County
4,474
Auburn
31
Sangamon County
4,410
Caseyville
32
St. Clair County
4,348
Scott AFB
33
St. Clair County
4,092
Sparta
34
Randolph County
4,005
Millstadt
35
St. Clair County
3,902
Rosewood Heights
36
Madison County
3,900
Smithton
37
St. Clair County
3,865
Dupo
38
St. Clair County
3,769
Red Bud
39
Randolph County
3,735
Holiday Shores
40
Madison County
3,352
New Baden
41
Clinton County
3,345
Virden
42
Macoupin County
3,148
Gillespie
43
Macoupin County
3,094
Madison
44
Madison County
3,041
Trenton
45
Clinton County
2,628
Washington Park
46
Madison County
2,466
Carrollton
47
Greene County
2,367
White Hall
48
Greene County
2,176
Brighton
49
Macoupin County
2,150
Fairmont City
50
Madison County
2,147
Mount Olive
51
Macoupin County
1,943
New Athens
52
St. Clair County
1,848
South Roxana
53
Madison County
1,842
Girard
54
Macoupin County
1,736
Marissa
55
St. Clair County
1,726
Bunker Hill
56
Macoupin County
1,586
Roodhouse
57
Greene County
1,498
Venice
58
Madison County
1,446
Benld
59
Macoupin County
1,403
Roxana
60
Madison County
1,401
St. Jacob
61
Madison County
1,367
Valmeyer
62
Monroe County
1,206
Hartford
63
Madison County
1,147
Worden
64
Madison County
1,062
Greenfield
65
Greene County
1,005
Marine
66
Madison County
951
Hamel
67
Madison County
916
Pleasant Hill
68
Pike County
902
Mitchell
69
Madison County
873
Grafton
70
Jersey County
807
Hardin
71
Calhoun County
782
Tilden
72
Randolph County
744
Livingston
73
Madison County
739
Brooklyn
74
St. Clair County
618
Thayer
75
Sangamon County
609
Alhambra
76
Madison County
604
St. Libory
77
St. Clair County
603
Palmyra
78
Macoupin County
592
Murrayville
79
Morgan County
546
Evansville
80
Randolph County
535
Wilsonville
81
Macoupin County
524
Elsah
82
Jersey County
516
Prairie Rocher
83
Monroe County
512
Shipman
84
Macoupin County
499
Moro
85
Madison County
490
Lenzburg
86
St. Clair County
445
Hecker
87
Monroe County
414
Prairietown
88
Macoupin County
391
East Carondelet
89
St. Clair County
370
Medora
90
Jersey County
364
Grantfork
91
Bond County
338
New Douglas
92
Madison County
335
Summerfield
93
St. Clair County
328
Ellis Grove
94
Randolph County
324
Mount Clare
95
Macoupin County
309
Ruma
96
Monroe County
309
Baldwin
97
Randolph County
308
Kampsville
98
Calhoun County
295
Fayetteville
99
St. Clair County
283
Kane
100
Greene County
280
Nebo
101
Pike County
275
East Gillespie
102
Macoupin County
260
Sawyerville
103
Macoupin County
259
Manchester
104
Scott County
253
White City
105
Macoupin County
218
Milton
106
Pike County
209
Lake Ka-Ho
107
Macoupin County
196
Nilwood
108
Macoupin County
196
Modesto
109
Macoupin County
179
Alsey
110
Scott County
177
Williamson
111
Macoupin County
175
Rockbridge
112
Greene County
169
Royal Lakes
113
Macoupin County
169
Chesterfield
114
Macoupin County
164
Fieldon
115
Jersey County
163
Batchtown
116
Calhoun County
161
Maeystown
117
Monroe County
147
Eldred
118
Greene County
144
Hettick
119
Macoupin County
140
Sauget
120
Madison County
130
Standard City
121
Macoupin County
126
Dorchester
122
Macoupin County
123
Brussels
123
Calhoun County
116
Eagarville
124
Macoupin County
109
Glasgow
125
Morgan County
106
Pearl
126
Pike County
102
Rockport
127
Pike County
102
Fidelity
128
Jersey County
98
Hamburg
129
Calhoun County
95
Scottville
130
Macoupin County
93
Hillview
131
Greene County
89
Wilmington
132
Will County
87
Otterville
133
Greene County
82
Rockwood
134
Randolph County
31
Floraville
135
Monroe County
26
Fults
136
Monroe County
24
Kaskaskia
137
Randolph County
23
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