She married her first cousin, Thomas Runyan, Jr. Thomas was born in 1702 in Piscataway, New Jersey. His parents were Thomas Runyan, Sr. He was a tailor and had a shop in Hopewell, New Jersey. Later he had a shop in Kingwood Township.
Sarah and Thomas had at least one son, Bonham Runyan, who was born about 1722. Sarah Runyan Conrad has also been named as their daughter.
Thomas Runyan was listed as a tax payer for Hunterdon County in 1722.
Sarah died before May 14, 1752 when Thomas married Hannah Stout.
Thomas died on February 22, 1770.
Hopewell is currently in Mercer (formerly Hunterdon) County, New Jersey. Mercer County was formed in 1838 from portions of other counties including Hunterdon. Early settlers found that their deeds were worthless and they were forced to repurchase their land or relocate. On April 23, 1715 the settlers who stayed organized Hopewell Baptist Church.