Grant is an unincorporated community and a U.S. Post Office in Park County, Colorado, United States. The community is located in foothills of the Front Range in the Platte Canyon, in the upper valley of the North Fork South Platte River, approximately 6 miles (10 km) east of Kenosha Pass. It sits along U.S. Highway 285 approximately 40 miles (64 km) southwest of Denver. It consists largely of a general store, post office, and surrounding houses and trailers along the south side of the highway and along the north side of the river. The Grant Post Office has the ZIP Code 80448. Grant is located at the mouth of Geneva Creek where it descends southward from the Front Range.