Deane married twice, both times to wealthy widows from Wethersfield. In 1763, he married Mehitable (Nott) Webb after assisting her with the settlement of her first husband's estate. They had one son, Jesse, born in 1764. Mehitable died in 1767. In 1770, Deane married Elizabeth (Saltonstall) Evards, granddaughter of Connecticut Governor Gurdon Saltonstall of the Massachusetts Saltonstall family. Elizabeth died in 1777 while Silas was in France. Both Mehitable and Elizabeth were buried in the Old Wethersfield Village Cemetery.
Deane married twice, both times to wealthy widows from Wethersfield. In 1763, he married Mehitable (Nott) Webb after assisting her with the settlement of her first husband's estate. They had one son, Jesse, born in ,1764. Mehitable died in 1767. In 1770, Deane married Elizabeth (Saltonstall) Evards granddaughter of Connecticut Governor Gurdon Saltonstall of the Massachusetts Saltonstall family. Elizabeth died in 1777 while Silas was in France. Both Mehitable and Elizabeth were buried in the Old Wethersfield Village Cemetery.