Henrico County (formerly Henrico Shire) /hɛnˈraɪkoʊ/, officially the County of Henrico, is a county located in the Commonwealth of Virginia. As of the 2010 census, the population was 306,935. In 2013, the population was estimated to be 316,973, making it the fifth-most populous county in Virginia and the sixth-most populous county-equivalent in Virginia.