Smithfield is a city in Cache County, Utah, United States. The population was 7,261 at the 2000 census. By 2004 its population had been estimated to increase to 7,801. It is included in the Logan, Utah-Idaho Metropolitan Statistical Area. Smithfield apartments for rent comparison page shows most up to date rent information on Smithfield apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.