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 2014, the population was estimated to be 321,924, making it the fifth-most populous county in Virginia and the sixth-most populous county-equivalent in Virginia. Henrico County is included in the Richmond, VA Metropolitan Statistical Area.

Named after the Citie of Henricus, Henrico became one of the eight original Shires of Virginia in 1634. It is one of the oldest counties in the United States. The City of Richmond was officially part of Henrico County until 1842, when it became a fully independent city. The present-day Henrico County curves around the City of Richmond, surrounding it to the west, north, and east. The county is bounded by the Chickahominy River to the north and the James River and Richmond to the south.

Richmond International Raceway is located in the central portion of Henrico County near Mechanicsville, just north of the Richmond city limits. Additionally, Richmond International Airport is located in the eastern portion of Henrico County in Sandston. Top private employers in the county include Capital One, Bon Secours Richmond Health System, and Anthem.