In 2021, the three core cities were inhabited by 749,786 people, while the Tricity together with its metropolitan area had a combined population of between 1 and 1.5 million, depending on the definition of the boundaries of the latter.

Tricity has a number of professional teams, which compete in basketball, volleyball, speedway, handball, rugby union and football.

Development of the Tricity was smoothed by the construction of the rapid transit rail (SKM) 1951, binding the whole area from Tczew by Gdańsk, Sopot 1953, Gdynia 1956, Reda, Rumia to Wejherowo 1957.

The Gdańsk Bay Public Transport Metropolitan Union (MZKZG), a body incorporated by the municipalities in the area to act as a common public transport authority, issues tickets valid both for the SKM Rapid Transit Rail, as well as for all or some of the trams and buses in Gdańsk or trolleybuses and buses in Sopot and Gdynia.

The dual carriageway Tricity Beltway (Obwodnica Trójmiejska) starts in the vicinity of Pruszcz Gdański and goes through the western districts of Gdańsk to Gdynia-Chylonia.

The variety and number of public bus lines and coach connections facilitates the travel around the Tricity and surrounding areas.

It currently provides regular service primarily on two dedicated railways complemented by some of the ordinary railways in the region, both as a commuter rail connecting some of the peripheral towns and villages with each other and with the principal cities of Gdańsk, Gdynia and Sopot, as well as internal rapid transit service within the urban core formed by the three cities.

The rapid transit rail network has achieved since its inception in 1951 a unifying effect on the metro area formerly divided by a frontier, by linking the connected localities with a frequent and reliable service.

More recently, a pre-war railway destroyed in 1945 by the retreating German army has been reconstructed as the 19.5 km Pomorska Kolej Metropolitalna (Pomeranian Metropolitan Railway) or PKM line, also been operated by the SKM, and put into service in 2015, providing connection of the downtown station of Gdańsk Wrzeszcz Station with the Gdańsk Lech Wałęsa Airport, with further service to the Gdynia Główna Station provided via an earlier existing railway, thus forming a loop connected to the primary SKM line directly at its southern terminus, while the northern terminus is connected indirectly through an earlier existing line.

Its position is associated with a well-developed network of domestic and international transport connections provided in response to the growing demand for business and tourist travel.

The convenient location of the airport makes it easy for travellers and cargo carriers to transfer from air to road, and also to the railway network and seaports.

Gdańsk Lech Wałęsa Airport has its own railway siding which can be used for handling large lots of cargo dispatched by air.