Comarnic () is a town in Prahova County, Muntenia, Romania, with a population of 11,106 as of 2021. Four villages are administered by the town: GhioÃÂeÃÂti, Podu Lung, Poiana, and Posada.
The town is situated in the southern foothills of the Carpathian Mountains, close to the interface between the Southern Carpathians and the Eastern Carpathians, at an altitude of . It lies towards the southern end of the Prahova Valley, along the Prahova River, in the main on the left bank, but with some of the component villages on the right bank of the river.
Comarnic is located in the western part of Prahova County, northwest of the county seat, PloieÃÂti. It is crossed by national road DN1 (part of European route E60), which starts in Bucharest and goes north towards BraÃÂov and on to the border with Hungary near Oradea; the partially built A3 motorway will also go through the town. The Comarnic train station and the Posada halt serve the CFR Main Line 300, which runs parallel to DN1.
Its name origin is the Romanian word "comarnic" for a kind of a shepherd's hut, of Slavic origin: komar=mosquito+ -nik, literally, "retreat from mosquitoes". It is used for milking sheep and storing milk and other dairy products.
Comarnic has a humid continental climate (Cfb in the Köppen climate classification).
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Cormarnic has one sister city: