Petrovice u Karviné (help·info) (1920-1952: Petrovice) (Polish: Piotrowice koło Karwiny , German: Petrowitz bei Freistadt) is a municipality in Karviná District, Moravian-Silesian Region, Czech Republic. It has a population of 5,350 (2011), which makes it the second largest municipality in the Czech Republic without an official town status. 13% of the population are the ethnic Poles, 1,2% are Slovaks and also 1,2% Silesians. Around 22,7% of the population is religious (mostly Roman-Catholic), which is about the double of the national average. It lies on the border with Poland, in the historical region of Cieszyn Silesia. The Petrůvka River flows through the municipality and enters the Olza River in Závada.
After the wary division of Cieszyn Silesia in 1920, the municipality became part of Czechoslovakia as Petrovice. Following the Munich Agreement, in October 1938, Petrovice and the whole Zaolzie region was annexed by Poland. The municipality was then annexed by Nazi Germany at the beginning of World War II. After the war it was restored to Czechoslovakia.
The municipality lies five kilometers north of the city centre of Karviná, next to the border with Poland. Formerly independent municipalities of Dolní Marklovice, Prstná and Závada are since 1952 administratively part of Petrovice.
The municipality is the site of the important railway border crossing to Zebrzydowice in Poland and it has also three road border crossings, as well as numerous tourist and bicycle routes border crossings.
- Memorial of Czechoslovak pilots Bílka and Slatinský, whose plane was shot down over Petrovice in World War II in Závada
- Saint Martin Church in Petrovice
- Ascension of the Lord Church in Dolní Marklovice
- Empire Chateau in Prstná
- Motocross racetrack
- BMX racetrack
- Hosák, Ladislav; and Rudolf Šrámek (1980). Místní jména na Moravě a ve Slezsku II, M-Ž. Praha: Academia.
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Coordinates: 49°53′46″N 18°32′38″E / 49.89611°N 18.54389°E