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Semlac (Hungarian: Szemlak) is a commune located in Arad County, in the western part of Romania, near the border with Hungary, is situated in the south-western part of the Arad Plateau, in the large valley of the Mureș River. Its territory occupies 8517 ha. It is composed of a single village, Semlac, situated at 37 km from Arad.
According to the last census, the population of the commune counts 3787 inhabitants, out of which 80.8% are Romanians, 3.6% Hungarians, 9.6% Roma, 3.6% Germans, 1.1% Slovaks, 0.7% Ukrainians and 0.6% are of other or undeclared nationalities.
The first documentary record of the locality Semlac dates back to 1256.
The economy of the commune is mainly agrarian, the locality is well known in the region as an important grain-bearing vegetable-growing place. The Livestock is based on pig and cattle raising.
Semlacu contains a nature park.
- Romanian census data, 2002; retrieved on March 1, 2010