Guam Highway 18
| GH-18 highlighted in red | ||||
| Route information | ||||
| Maintained by Guam Department of Public Works | ||||
| Length | 2.3 km (1.4 mi) | |||
| Major junctions | ||||
| East end | GH-1 in Piti | |||
| West end | Dead end at Drydock Island | |||
| Location | ||||
| Country | United States | |||
| Territory | Guam | |||
| Highway system | ||||
| 
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Guam Highway 18 (GH-18) is one of the primary automobile highways in the United States territory of Guam.