Trinec is a statutory city in Frydek-Mistek District in the Moravian-Silesian Region of the Czech Republic. It has about 35,000 inhabitants and is the least populated statutory city in the Czech Republic.

The city is an important cultural centre of the Polish minority in Zaolzie, which makes up 13.9% of the population (as of 2011).

Trinec is notable for its steel plant, the Trinec Iron and Steel Works, the largest in the Czech Republic, which still has a major impact on the city, on its character, demographics, and air quality.

There are a number of musical concerts that take place in the city throughout the year. They are usually held at the local football stadium or the Trinecky Zimni Stadion sports arena, or alternatively at the Trinec-Borek football grounds. The year's biggest events are the 'Hutnicky den', which takes place in May, and 'Noc Plna Hvezd' (Star-Studded Night) in the summer, both festivals which feature numerous live performances from bands and artists from all over the country and abroad. Another yearly event is the 'Zlot' concert in the nearby town of Bystrice, aimed at the local Polish population.