Siloam is an unincorporated community in southeastern Surry County, North Carolina, United States. The Yadkin River makes up the community's southern border, and the Ararat River flows between it and the community of Shoals to the east. It is a Piedmont Triad community.The population of the ZIP Code Tabulation Area for Siloam's ZIP code was 1,233 at the 2000 census.