Coordinates: Hope Island is a 91-acre (0.368 km²) island located in Narragansett Bay in the State of Rhode Island. It is part of the Narragansett Bay National Estuarine Research Reserve, along with nearby Prudence Island and Patience Island, and home to colonial wading birds during their nesting season of spring and summer.
The island was a gift from Narraganset chief Miantonomi to Roger Williams, the founder of Rhode Island. The word "hope" is the Rhode Island motto and used on the Rhode Island State Seal with an anchor because Williams was inspired by the Biblical passage "hope is the anchor of the soul" in Hebrews 6:19.
There is an 18th-century farm site on the west side of Hope Island. To date, no archaeological work or documentary research has been carried out there. During World War II, the island was used by the U.S. Navy as an ammunition storage site. There are still ammunition bunkers and concrete roads remaining from this period.
Hope Island was acquired by the state in the early 1970s.