Gdynia is a city in northern Poland and a seaport on the Baltic Sea coast. With a population of 244,969, it is the 12th-largest city in Poland and the second-largest in the Pomeranian Voivodeship after Gdańsk. Gdynia is part of a conurbation with the spa town of Sopot, the city of Gdańsk, and suburban communities, which together form a metropolitan area called the Tricity (Trójmiasto) with around 1,000,000 inhabitants.
Historically and culturally part of Kashubia and Eastern Pomerania, Gdynia for centuries remained a small fishing village. By the 20th-century it attracted visitors as a seaside resort town. In 1926 Gdynia was granted city rights, after which it enjoyed demographic and urban development, with a modernist cityscape. It became a major seaport city of Poland. The violent 1970 protests in and around Gdynia contributed to the rise of the Solidarity movement in nearby Gdańsk.
The port of Gdynia is a regular stopover on the cruising itinerary of luxury passenger ships and ferries travelling to Scandinavia. The city is also known for holding the annual Gdynia Film Festival. In 2013, Gdynia was ranked by readers of The News as Poland's best city to live in, and topped the national rankings in the category of "general quality of life". In 2021, the city entered the UNESCO Creative Cities Network and was named UNESCO City of Film.
Gdynia hosts the Gdynia Film Festival, the main Polish film festival. The International Random Film Festival was hosted in Gdynia in November 2014. Since 2003 Gdynia has been hosting the Open'er Festival, one of the biggest contemporary music festivals in Europe. The festival welcomes many foreign hip-hop, rock and electronic music artists every year. In record-high 2018 it was attended by over 140,000 people, who enjoyed the lineup headlined by Bruno Mars, Gorillaz, Arctic Monkeys and Depeche Mode. Another important summer event in Gdynia is the Viva Beach Party, which is a large two-day techno party made on Gdynia's Public Beach and a summer-welcoming concerts CudaWianki. Gdynia also hosts events for the annual Gdańsk Shakespeare Festival.
In the summer of 2014 Gdynia hosted Red Bull Air Race World Championship.