Gerlaw is an unincorporated community in Warren County, Illinois, United States. Gerlaw is 6 miles (9.7 km) north-northeast of Monmouth.
Gerlaw had a post office, which closed on August 28, 2010.[3]
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| post code | city | state | latitude | longitude |
|---|---|---|---|---|
| 61435 | Gerlaw | IL | 40.98698 | -90.6018 |