Râmnicu Sărat is a city in Buzău County, Romania, in the historical region of Muntenia. It was first attested in a document of 1439, and raised to the rank of municipiu in 1994. The city rises from a marshy plain, east of the Carpathian Mountains, and west of the cornlands of southern Moldavia. It lies on the left bank of the river Râmnicul Sărat. Salt and petroleum are worked in the mountains, and there is a considerable trade in agricultural produce and preserved meat.