| Marblehead | |
| Settlement Type: | Unincorporated community |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Adams |
| Subdivision Type3: | Township |
| Subdivision Name3: | Fall Creek |
| Pushpin Map: | Illinois#USA |
| Pushpin Map Caption: | Location of Marblehead within Illinois |
| Coordinates: | 39.8397°N -91.3686°W |
| Population As Of: | 2000 |
| Population Density Km2: | auto |
| Timezone1: | CST |
| Utc Offset1: | -6 |
| Timezone1 Dst: | CDT |
| Utc Offset1 Dst: | -5 |
Marblehead is an unincorporated community in Adams County, Illinois, United States, just south of Quincy. Illinois State Route 57 is the main auxiliary route through the town and travels north to the business district of Quincy or south to Interstate 72 (near Hannibal, Missouri).
The community is part of the Quincy, IL - MO Micropolitan Statistical Area.
Marblehead is prone to flooding and during the Flood of 2008, the town was flooded with water from the Mississippi River. A temporary (and satirically named) "Lake Marblehead" was formed when the flood plain flooded.[1]