| Gilson, Illinois | |
| Settlement Type: | Census-designated place |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Knox |
| Subdivision Type3: | Township |
| Subdivision Name3: | Haw Creek |
| Pushpin Map: | Illinois#USA |
| Pushpin Label: | Gilson |
| Pushpin Label Position: | top |
| Coordinates: | 40.8614°N -90.1892°W |
| Area Footnotes: | [1] |
| Area Total Km2: | 0.86 |
| Area Total Sq Mi: | 0.33 |
| Area Land Sq Mi: | 0.33 |
| Area Water Sq Mi: | 0.00 |
| Population As Of: | 2020 |
| Population Total: | 156 |
| Population Density Km2: | 182.03 |
| Population Density Sq Mi: | 471.30 |
| Timezone1: | CST |
| Utc Offset1: | -6 |
| Timezone1 Dst: | CDT |
| Utc Offset1 Dst: | -5 |
| Blank Name: | FIPS code |
| Blank Info: | 17-29340 |
| Unit Pref: | Imperial |
| Area Land Km2: | 0.86 |
| Area Water Km2: | 0.00 |
Gilson is an unincorporated census-designated place in Knox County, Illinois, and is located southeast of Galesburg. As of the 2010 Census, its population was 190.[2] It is part of the Galesburg Micropolitan Statistical Area. Gilson is located just east of Illinois Route 97 along Knox County Highway 12. The BNSF Railway runs through the town.
Gilson lies on a flat plain yielding to hills and valleys close to Haw Creek, west of the town. The area is agricultural with corn, soybeans, hay, wheat, and hogs as the major commodities raised. Small parcels of timber are also located in several areas near Gilson.