Kojkovice

(Polish: , German: Nieder Lischna) is a village in Frýdek-Místek District, Moravian-Silesian Region, Czech Republic. It was a separate municipality but became administratively a part of Třinec in 1946. It has a population of 4,600 (1 January 2008).It lies in the Silesian Foothills and in the historical region of Cieszyn Silesia.

(Polish: , German: Ober Lischna) is a village in Frýdek-Místek District, Moravian-Silesian Region, Czech Republic. It was a separate municipality but became administratively a part of Třinec in 1960. It lies on the border with Poland, in the historical region of Cieszyn Silesia and has a population of 311 (1 January 2008).Until the 1920 division of Cieszyn Silesia between Poland and Czechoslovakia it was a part of the village of Leszna Górna, which now lies in Poland.

Třinec (Czech: [ˈtr̝̊ɪnɛts] ; Polish: Trzyniec [ˈtʂɨɲɛt͡s] ; German: Trzynietz) is a city in Frýdek-Místek District in the Moravian-Silesian Region of the Czech Republic. It has about 34,000 inhabitants and is the least populated statutory city in the country. The city is an important cultural centre of the Polish minority in Trans-Olza, which makes up 12.1% of the population (as of 2021).Třinec is notable for the Třinec Iron and Steel Works steel plant, the largest in the country, which still has a major impact on the city, its character, demographics, and air quality.

Staré Město (Polish: Stare Miasto, "Old Town") is administratively a part of the town of Třinec in Frýdek-Místek District, Moravian-Silesian Region, Czech Republic. It is the historical centre of the town. It lies in the historical region of Cieszyn Silesia and has a population of 5,713 (1 January 2008).Staré Město is a place where the main urban settlement grew alongside Třinec Iron and Steel Works from the 19th century up to World War II. In 1946 merged with the town was the village of Lyžbice where in the 1950s the ruling Communist Party of Czechoslovakia began a large scale development in the style of socialist realism. Afterwards Lyžbice became a new downtown, overtaking the role from Staré Město (lit. Old Town).

Puńców is a village in Gmina Goleszów, Cieszyn County, Silesian Voivodeship, Poland, on the border with the Czech Republic. The village lies in the Silesian Foothills and in the historical region of Cieszyn Silesia. The name is probably of possessive origin derived from personal name Puńc (such a name was probably derived from Middle High German word punze, ponze, later a nickname?).

Dzięgielów is a village in Gmina Goleszów, Cieszyn County, Silesian Voivodeship, southern Poland, near the border with the Czech Republic. It lies in the Silesian Foothills and in the historical region of Cieszyn Silesia. Dzięgielów is one of the most Protestant municipalities of the region. Centre for mission and evangelization of the Evangelical-Augsburg Church is located here. Every year evangelization week occurs on the football field.

The Tyra (also called Tyrka) is a stream in the Czech Republic, a left tributary of the Olza River. It flows through Třinec in the Moravian-Silesian Region. It is 13.2 km (8.2 mi) long.

Třinec Iron and Steel Works (TŽ) (Czech: Třinecké železárny, Polish: Huta trzyniecka) is a producer of long rolled steel products in Třinec, Moravian-Silesian Region, Czech Republic. TŽ produces over a third of all steel produced in the Czech Republic (roughly 2.5 million tons annually). Since its establishment, Třinecké železárny's plants have produced more than 150 million tons of crude steel. Moravia Steel is the major shareholder of TŽ, the biggest Czech steel company controlled by domestic capital.

is a village in Gmina Goleszów, Cieszyn County, Silesian Voivodeship, in southern Poland, on the border with the Czech Republic. It lies in the Silesian Foothills and in the historical region of Cieszyn Silesia.

Sport Hall STARS Třinec is a sports hall in Třinec, Czech Republic. The hall has a capacity of 900 spectators. The floorball club FBC Třinec uses it for its home matches, and other clubs in the vicinity from the 2023–24 season. It was used for home matches by the futsal club SKP Ocel Třinec, which, however, ceased its activities during the COVID-19 pandemic. Many various company events and balls are also held here.

(Polish: , German: Lischbitz) is a part of the town of Třinec in Frýdek-Místek District, Moravian-Silesian Region, Czech Republic, on the Olza River. It was a separate municipality but later became administratively a part of the town of Třinec. It lies in the historical region of Cieszyn Silesia and has a population of 17,239 (1 January 2008).The name is of patronymic origins derived from personal name *Łyżba.

Stadion Rudolfa Labaje is a football stadium in Třinec in the Czech Republic. It is the home ground of football side FK Třinec. The stadium is named after Rudolf Łabaj, a local Polish footballer who played for the club. It is one of the smallest stadiums in the Czech 2. Liga with a capacity of about 2,200.