About Us : Plymouth is older than Washington County. Established in 1787.For 70 years prior to Plymouths founding, generations of the Rhodes family had been planters in the area. Arthur Rhodes founded what was to become Plymouth from land he acquired through inheritance, gift deeds and purchases. This collection of property became his plantation and was called Brick House. From that property he sectioned off one hundred acres, subdividing them into 172 lots, which he would sell. These lots were the beginnings of Plymouth. He sold 16 lots.