Lacey Green is a village and civil parish in the Buckinghamshire district, south-east of Princes Risborough, in the ceremonial county of Buckinghamshire, England. It is in the Chiltern Hills above the town. In 2021 the parish had a population of 2397. The settlement was known as Leasy Green in the early 19th century. Hamlets within the parish include Loosley Row, Speen, Wardrobes and Parslow's Hillock. RAF Bomber Command commandeered agricultural land for an airfield during World War II. The land has since reverted to agriculture, the school playing field and the village sports ground.