Mason probably arrived at Norfolk, Virginia on the ship Assurance in 1652. Mason was accompanied by his younger brother William, cousins and neighbors from England, Thomas and Gerard Fowke of Staffordshire. He settled in Westmoreland County, Virginia in the early 1650s and was associated with the naming of Stafford County when it was formed from Westmoreland County in 1664. Mason eventually settled permanently near an Indian village along Accokeek Creek on a hill between present-day State Routes 608 and 621 in Stafford County. He named his residence Accokeek, later rechristened Rose Hill. The property was named for the now extinct Accokeek tribe which inhabited present-day Prince George's County, Maryland. Accokeek plantation began as and gradually increased to in size.
Political involvement in Virginia
Mason represented Stafford County in the House of Burgesses and in 1670, he served as the county's second sheriff. Mason served as Stafford County's county lieutenant in 1675. Mason also served as a Justice of the Peace and vestryman. Mason also served as a colonel in Stafford County's militia. In the Acts of the Assembly for 1675, 1679, and 1684, Colonel Mason was actively engaged in defending his frontier county against the Indians.
Marriage and children
Mason married Mary French in 1658. He and Mary had one son:
Mason married thirdly to Frances Norgrave in 1669 in Stafford County, Virginia. They had one daughter, Sarah E. Mason, born in 1672.
Later life
Mason died in 1686. His body was interred in 1686 on a hillside at Accokeek in Stafford County, Virginia. His gravesite is currently unmarked.
Masonvale
, named in honor of Mason's great-grandson, re-established its Naming Committee to research and select names for its campus facilities and infrastructure. The committee agreed upon the name "Masonvale" for its faculty and staff housing community in the northeast section of George Mason University's Fairfax Campus. The appendage of "vale" was derived from George Mason I's birthplace, Pershore, which lies in an agricultural region known as the Vale of Evesham in Worcestershire, England. To unify the naming theme within Masonvale, the names "Pershore" and "Evesham" were then used as street names for the community. Other street names used are "Bredon Hill," "Cotswolds Hill," and "Staffordshire." All are regions of Old Worcestershire where many of Mason's ancestors once resided.