| Official Name: | Gerlaw, Illinois |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Illinois#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Warren |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 735 |
| Coordinates: | 40.9869°N -90.6017°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 61435[1] |
| Area Code: | 309 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 408963 |
Gerlaw is an unincorporated community in Warren County, Illinois, United States. Gerlaw is 6miles north-northeast of Monmouth.
Gerlaw had a post office, which closed on August 28, 2010.[2]