Just Room Enough Island, also known as Hub Island, is an island located in the Thousand Islands chain, in New York, United States. The island is known for being the smallest inhabited island, which appears to be around 3,300 square feet (310 m), or about one-thirteenth of an acre. Purchased by the Sizeland family in the 1950s, the island has a house, a tree, shrubs, and a small beach.

The island was bought in the 1950s by the Sizeland family, who wanted a holiday getaway and built a house there. Because of the island's small size, in 2010, The Washington Post stated, "One misstep and you're swimming".

Bishop Rock was formerly the smallest inhabited island but lost its title in 1982 when the lighthouse became automated and hence had no need for human presence.

Just Room Enough lies on the Saint Lawrence River between Heart Island and Imperial Isle, close to the US border with Canada. The island is part of Alexandria Bay, a village within the town of Alexandria, Jefferson County, New York. From Boldt Castle, this little red house is very easy to spot.

• List of notable Thousand Islands

• Media related to Just Room Enough Island at Wikimedia Commons