Holcomb is an unincorporated community located in Grenada County, Mississippi and part of the Grenada Micropolitan Statistical Area . Holcomb is approximately 10 miles (16 km) west of Grenada and 14 miles (23 km) east of Philipp at the intersection of Mississippi Highway 7 & Mississippi Highway 8.Although an unincorporated community, Holcomb has a post office and a zip code of 38940.