Rhode Island Borders: States, Map & Complete Guide
Fact-checked • Updated January 11, 2026
Rhode Island borders two states: Connecticut to the west and Massachusetts to the north and east. The Atlantic Ocean forms Rhode Island's southern boundary through Narragansett Bay and the open ocean. Despite its name, Rhode Island is not entirely an island—the mainland makes up most of the state's area, though the state does include several islands including Aquidneck Island (Rhode Island), Block Island, and others.
Rhode Island Border Map
Map showing Rhode Island's boundaries with two states, the Atlantic Ocean, and Narragansett Bay.
Border Details
Explore each of Rhode Island's borders in detail. Click any card to learn more.
Massachusetts
Massachusetts borders Rhode Island to the north and east, wrapping around most of the state.
Connecticut
The Pawcatuck River forms part of Rhode Island's western border with Connecticut.
Atlantic Ocean
The Atlantic Ocean borders Rhode Island through Narragansett Bay and coastal waters.
Which States Border Rhode Island?
Rhode Island borders only two states: Massachusetts to the north and east, and Connecticut to the west. This makes Rhode Island one of the states with the fewest neighbors. Massachusetts nearly surrounds Rhode Island, bordering it on two sides.
North and East: Massachusetts
Massachusetts borders Rhode Island on two sides—the northern border and most of the eastern border. This creates an unusual situation where Massachusetts wraps around Rhode Island on multiple sides.
The Rhode Island-Massachusetts border extends for about 160 miles total when counting both the northern and eastern boundaries. The northern border runs roughly east-west across the top of Rhode Island. The eastern border runs north-south, separating Rhode Island from southeastern Massachusetts and Cape Cod. Rhode Island counties along this border include Providence, Bristol, Newport, and Washington. On the Massachusetts side, Bristol County, Plymouth County, and Barnstable County sit along the border.
- About 160 miles total (north and east sides)
- Massachusetts wraps around Rhode Island
- All five Rhode Island counties touch this border
West: Connecticut
Connecticut borders Rhode Island on the western side. The Pawcatuck River forms the southern portion of this boundary, while a land border continues to the north.
The Rhode Island-Connecticut border runs for about 50 miles from Massachusetts in the north to the Atlantic Ocean in the south. The Pawcatuck River creates a natural border for roughly 15 miles in the southern section before flowing into Little Narragansett Bay. Rhode Island counties along this border include Providence, Kent, and Washington. On the Connecticut side, New London and Windham counties touch the border. The city of Westerly, Rhode Island sits right on this border.
- About 50 miles north-south
- Pawcatuck River in southern section
- Westerly, RI on the border
Atlantic Ocean and Narragansett Bay
The Atlantic Ocean forms Rhode Island's southern boundary through Narragansett Bay and coastal waters. Rhode Island has about 384 miles of tidal shoreline when including all the bays, inlets, and islands.
South: Atlantic Ocean
The Atlantic Ocean borders Rhode Island along its southern coast. Narragansett Bay, a major estuary of the Atlantic, extends deep into the state and shapes much of Rhode Island's geography and economy.
Rhode Island's Atlantic coastline is complex because of Narragansett Bay, which divides the mainland from the state's islands. The general coastline is about 40 miles, but the tidal shoreline totals approximately 384 miles when including bays, inlets, and islands. Major coastal features include Newport on Aquidneck Island, Block Island 12 miles offshore, and numerous smaller islands. Providence, the state capital, sits at the head of Narragansett Bay. Newport was historically a major port and remains a famous sailing destination.
- About 40 miles general coast, 384 miles tidal shoreline
- Narragansett Bay extends into state
- Includes Block Island and Aquidneck Island
Is Rhode Island Actually an Island?
Despite its name, Rhode Island is not entirely an island. The state includes both mainland territory and several islands. The mainland portion, where Providence and most of the population lives, makes up the majority of Rhode Island's area and borders Massachusetts and Connecticut. The name 'Rhode Island' originally referred to Aquidneck Island (also called Rhode Island), the largest island in Narragansett Bay where Newport is located. When the colony was founded, it included both the mainland and the islands. The official name became 'State of Rhode Island and Providence Plantations' (shortened to just 'Rhode Island' in 2020). Other significant islands in Rhode Island include Block Island, Conanicut Island, and Prudence Island. So while Rhode Island does contain islands, most of the state is connected to the mainland of North America.
America's Smallest State
Rhode Island is the smallest U.S. state by area at just 1,214 square miles. Despite bordering only two states, Rhode Island's small size means it has relatively long borders compared to its total area. The Massachusetts border (about 160 miles) is actually longer than the distance across the entire state. Rhode Island spans only about 37 miles north to south and 48 miles east to west at its widest points. The state's small size has led to the common measurement of using 'Rhode Islands' as a unit of comparison—news articles often describe large areas as being 'twice the size of Rhode Island' or similar comparisons.
Key Facts & Statistics
This table shows every border Rhode Island shares, organized by direction and type.
Rhode Island borders only two U.S. states—the fewest of any state except Hawaii and Alaska
Frequently Asked Questions
What states border Rhode Island?
What borders Rhode Island?
How many states border Rhode Island?
What ocean borders Rhode Island?
Is Rhode Island an island?
Does Rhode Island border Massachusetts?
Does Rhode Island border Connecticut?
What river borders Rhode Island and Connecticut?
Sources & References
This article has been researched using authoritative sources to ensure accuracy and reliability.
Geographic features, river boundaries, and topographic data
Coastline and Narragansett Bay information