Puerto Rico Islands: Vieques, Culebra, Mona & Map (2026)

Updated October 11, 2026. Ferry fares from Puerto Rico Ferry (operator); land area and 2020 population from U.S. Census figures cited on our sources list; Desecheo access from U.S. Fish & Wildlife Service.

Puerto Rico is an archipelago, not a single rock in the sea. The main island holds most towns and roads. Two island-municipalities — Vieques and Culebra — are inhabited to the east. Mona and Desecheo are nature reserves with strict access rules. Dozens of smaller cays sit off the coasts.

Main island (at a glance)

Census figures put Puerto Rico’s land area at about 3,424 square miles and the 2020 population at 3,285,874. Spanish and English are both official languages; the U.S. dollar is the currency; and U.S. citizens flying from the mainland do not need a passport (USA.gov). A coastal drive around the main island is a long day — see how long it takes to drive around Puerto Rico. For beaches and the national forest, start with beaches and El Yunque.

Vieques

Vieques sits east of the main island and is known for quiet beaches and Mosquito Bay, one of Puerto Rico’s bioluminescent bays (see bioluminescent bays). There is no big resort strip; plan lodging and a scooter or jeep if you want remote beaches.

Getting there: passenger ferries leave from the Ceiba terminal (former Roosevelt Roads waterfront) — not from Fajardo’s old ferry dock. Small planes also fly from the San Juan area. Details: how to get to Vieques and Vieques tours.

Culebra

Culebra is smaller and famous for Flamenco Beach. Town services cluster around Dewey; many beaches need a short ride or hike.

Getting there: same story as Vieques — ferry from Ceiba, or a short flight. See how to get to Culebra and Vieques vs. Culebra.

Ferry reality (October 2026)

Puerto Rico Ferry lists adult one-way fares of $2.00 Ceiba–Vieques and $2.25 Ceiba–Culebra (children and seniors have lower published rates). Vehicles may board only if owned by a Vieques or Culebra resident at this time. Schedules change; buy tickets and check alerts on puertoricoferry.com. San Juan to Ceiba is roughly an hour’s drive without heavy traffic — leave margin on ferry days.

Mona

Mona is a large, remote nature reserve in the Mona Passage, managed by Puerto Rico’s Department of Natural and Environmental Resources (DRNA). It is not a drop-in day trip. Overnight stays, camping and related activities need DRNA authorization, and seasons are set by the agency — contact DRNA well before any plan. Do not assume a charter can land you without permits.

Desecheo

Desecheo is a U.S. Fish & Wildlife Service refuge west of the main island in the Mona Passage. FWS says visitors may not go ashore right now because of leftover military explosives; any future opening depends on cleanup and a safety sign-off. Dive operators may run trips in nearby waters under their own permits — that is not the same as landing on the island. Do not attempt to go ashore.

Other cays visitors ask about

Culebrita: small uninhabited island off Culebra; boat day trips when conditions allow; protected shoreline and an old lighthouse ruin.
Icacos and the Fajardo cays: popular snorkel day trips from the east coast; book with a licensed operator and check sea conditions.
Caja de Muertos (off Ponce): boat day trips from the south coast; confirm current departures locally — start with Ponce.
Gilligan’s Island / Cayo Aurora (Guánica): water access from the Guánica area; confirm the current boat or water-taxi setup before you drive.

Who should hop islands

First trip, short stay: main island first; add a Vieques or Culebra day or overnight only if ferry/flight timing fits.
Beach collectors: Culebra for Flamenco; Vieques for quieter coves and the bio bay.
Expedition mindset: Mona only with proper DRNA process; skip Desecheo landings entirely.

More: Is Puerto Rico part of the US?, renting a car, places to stay.

FAQ

Is Puerto Rico an island? Yes — and an archipelago: main island plus Vieques, Culebra, Mona, Desecheo and many cays.

How many inhabited islands? Three: the main island, Vieques and Culebra.

Do ferries still leave from Fajardo? No for the Vieques/Culebra passenger service — use the Ceiba terminal.

Can visitors take a car on the ferry? Currently only residents of Vieques or Culebra may bring vehicles (operator rule).

Can you visit Desecheo? FWS currently bars public landings; do not go ashore.

Quick answer

Yes — and more than one. Puerto Rico is an archipelago in the Caribbean, east of the Dominican Republic and west of the US Virgin Islands. It is made up of the main island, the inhabited island-municipalities of Vieques and Culebra, the nature reserves of Mona and Desecheo, and many small cays.

Land area: about 3,424 square miles; 2020 population 3,285,874 (US Census).
Vieques and Culebra lie east of the main island. Ferries leave from Ceiba; adult fares are $2.00 (Vieques) and $2.25 (Culebra) one way, with a new fare scheme postponed to Dec. 31, 2026.
US territory: the US dollar is the currency, and Spanish and English are both official languages.

Frequently asked questions

Is Puerto Rico an island?

Yes. Puerto Rico is an archipelago: a main island plus Vieques, Culebra, Mona, Desecheo and many smaller cays and islets.

How many inhabited islands does Puerto Rico have?

Three: the main island, Vieques and Culebra.

How do you get to Vieques and Culebra?

By ferry from Ceiba or by small plane from the San Juan area. Adult ferry fares are $2.00 (Vieques) and $2.25 (Culebra) one way; a new fare scheme was postponed to Dec. 31, 2026.

Where is Puerto Rico?

In the northeastern Caribbean, east of the Dominican Republic and west of the US Virgin Islands.

How big is Puerto Rico?

About 3,424 square miles of land, with a 2020 population of 3,285,874 (US Census).

Sources we checked

Checked in October 2026. Where a fact could not be confirmed against a primary source, we removed it or said so.

Originally published on PuertoRico.com (2023-03-05). Reviewed and updated October 2026: facts were checked against the sources above.