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230 S Main St, Monmouth, IL 61462-2160
105 N E St Ste 201, Monmouth, IL 61462-3044
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Phone numbers with the Monmouth rate center prefixes:
Local Time
05:54 PM
Date
Sunday, July 06, 2025
Time Zone
CDT
Monmouth has a population of 8837 people. Sex ratio is 90.40 males per 100 females.
The median age in Monmouth is 34.8 years.
| Age Groups | Population |
|---|---|
| Under 5 years | 439 |
| 5 to 9 years | 538 |
| 10 to 14 years | 520 |
| 15 to 19 years | 923 |
| 20 to 24 years | 985 |
| 25 to 29 years | 312 |
| 30 to 34 years | 516 |
| 35 to 39 years | 577 |
| 40 to 44 years | 486 |
| 45 to 49 years | 336 |
| 50 to 54 years | 548 |
| 55 to 59 years | 538 |
| 60 to 64 years | 621 |
| 65 to 69 years | 541 |
| 70 to 74 years | 271 |
| 75 to 79 years | 254 |
| 80 to 84 years | 214 |
| 85 years and over | 218 |
| Racial/Ethnic Groups | Percent |
|---|---|
| White | 6402 |
| Black or African American | 546 |
| American Indian and Alaska Native | 46 |
| Native Hawaiian and Other Pacific Islander | 11 |
| Some Other Race | 859 |
| Two or more races | 737 |
