The biggest coastal cities (by population):
- Saint Petersburg (Russia) 4,700,000 (metropolitan area 6,000,000)
- Stockholm (Sweden) 843,139 (metropolitan area 2,046,103)
- Riga (Latvia) 709,000 (metropolitan area 842,000)
- Helsinki (Finland) 579,016 (metropolitan area 1,303,126)
- Copenhagen (Denmark) 502,204 (metropolitan area 1,823,109) (facing the Sound)
- Gdańsk (Poland) 462,700 (metropolitan area 1,041,000)
- Kaliningrad (Russia) 431,500
- Szczecin (Poland) 413,600 (metropolitan area 778,000)
- Tallinn (Estonia) 401,774
- Malmö (Sweden) 290,078 (facing the Sound)
- Gdynia (Poland) 255,600 (metropolitan area 1,041,000)
- Kiel (Germany) 242,000
- Espoo (Finland) 234,400 (part of Helsinki metropolitan area)
- Lübeck (Germany) 216,100
- Rostock (Germany) 212,700
- Klaipėda (Lithuania) 194,400
- Turku (Finland) 175,000
- Oulu (Finland) 130,000
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Important ports (though not big cities):
- Liepāja (Latvia) 85,000
- Norrköping (Sweden) 84,000
- Pori (Finland) 83,000
- Gävle (Sweden) 69,000
- Kotka (Finland) 55,000
- Świnoujście (Poland) 50,000
- Kołobrzeg (Poland) 46,000
- Pärnu (Estonia) 44,568
- Ventspils (Latvia) 44,000
- Port of Police (The Seaport on The Oder River) in Police, Poland (34,319)
- Baltiysk (Russia) 34,000
- Trelleborg (Sweden) 26,000
- Karlshamn (Sweden) 19,000
- Port of Naantali (Finland) 18,858
- Maardu (Estonia) 16,570
- Sillamäe (Estonia) 16,567
- Władysławowo (Poland) 15,000
- Darłowo (Poland) 14,000
- Oxelösund (Sweden) 11,000
- Mariehamn (Finland) 11,000
- Hanko (Finland) 10,000
- Sassnitz (Germany) 11,000
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