Mizil (Romanian pronunciation: [miˈzil]) is a town in Prahova County, Romania. Located in the southeastern part of the county, it lies along the road between the cities of Ploieşti and Buzău, and to the northeast of the national capital, Bucharest. Its position led it to become a thriving market town beginning in the 18th century, before a long period of economic decline began in the early 20th century.