Where Is the Adriatic Sea Located?

The Adriatic Sea (Click here to see map) is one of the historically significant bodies of water in Europe. Nestled between the Italian Peninsula and the Balkan Peninsula, it forms a key part of the Mediterranean Sea, attracting millions of tourists each year with its crystal-clear waters, picturesque coastal towns, and rich maritime heritage.

But where is the Adriatic Sea located? Which countries border it, and why is it so famous? In this guide, we will answer all your questions.

Where Is the Adriatic Sea Located?

The Adriatic Sea is a semi-enclosed body of water separating Italy from the Balkan Peninsula. It stretches:

• From the northwest (Gulf of Venice, near Italy)
• To the southeast (Strait of Otranto, where it meets the Ionian Sea)

Key geographic facts:

• Length: ~800 km (500 miles)
• Width: 200 km (124 miles) at its broadest point
• Total area: ~138,000 km² (53,000 sq mi)

Bordering countries: Italy, Croatia, Slovenia, Bosnia and Herzegovina, Montenegro, and Albania.

(See on Google Maps)

Which Countries Border the Adriatic Sea?

Six countries share a coastline with the Adriatic Sea:

1. Italy (Eastern coast, including Venice, Rimini, and Bari)
2. Slovenia (Short but scenic coastline, featuring Koper)
3. Croatia (Longest coastline, famous for Dubrovnik & Split)
4. Bosnia and Herzegovina (Only 20 km of coast at Neum)
5. Montenegro (Home to the Bay of Kotor, a UNESCO site)
6. Albania (Less touristy but stunning beaches like Dhërmi)

Why does Croatia have so many islands?
The Croatian coast is dotted with over 1,200 islands due to geological shifts and ancient sea-level changes.

Is the Adriatic Sea Part of the Mediterranean?

Yes, the Adriatic Sea is a northern extension of the Mediterranean Sea.

• Connection: Linked to the Ionian Sea via the Strait of Otranto (72 km wide).
• Differences from the Mediterranean:
  • Shallower (average depth: 252 m vs. Mediterranean’s 1,500 m)
  • Less salty due to river inflows (Po, Neretva, Drin)

How Deep Is the Adriatic Sea?

Average depth: 252 meters (827 feet)
Deepest point: South Adriatic Pit (1,233 m / 4,045 ft deep)

Compared to other seas:

• Mediterranean Sea: ~1,500 m (4,900 ft)
• Black Sea: ~1,200 m (3,900 ft)

The northern Adriatic is much shallower (under 100 m), making it ideal for swimming and sailing.

Major Cities & Ports on the Adriatic Sea

Some of the most famous coastal destinations include:

Why Is the Adriatic Sea So Blue and Clear?

The Adriatic’s mesmerizing blue hue comes from:
Low algae & plankton levels → Less green tint
Shallow coastal zones → Sunlight reflects brilliantly
Fast water exchange (via the Otranto Strait) → Keeps it clean