 The island lies between Melville and Prudence Island and is uninhabited and has a land area of 0.12 km² (29.65 acres) and is only 13 feet above sea level.The salt marshes of Dyer Island are among the last remaining in Rhode Island without mosquito ditches, and the island is home to various shorebirds.In the seventeenth century, Dyer Island was named after William Dyer, the husband of the Quaker martyr Mary Dyer.