Clinton County is comprised of 14 diverse metropolitan and rural communities. These communities and their approximate populations are:
Andover
87
Calamus
394
Camanche
4,215
Charlotte
421
Clinton
27,772
Delmar
514
De Witt
5,049
Goose Lake
232
Grand Mound
676
Lost Nation
497
Low Moor
240
Toronto
134
Welton
159
Wheatland
772