| Official Name: | Bigneck, 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: | Adams |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 673 |
| Coordinates: | 40.1375°N -91.1558°W |
| Area Code: | 217 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 422221 |
Bigneck, also known as Big Neck, is an unincorporated community in Keene Township, Adams County, Illinois, United States. Bigneck is located 7.7miles west-northwest of Golden. The community is served by Illinois Route 61. There remain about two houses in the community and no businesses.[1] Bigneck once had a post office which is now defunct. A. Otis Arnold (1878 - 1941), Illinois businessman and politician, was born near Bigneck, in Adams County.[2]