Liljendal is a former municipality of Finland.
It is located in the province of Southern Finland and was part of the Eastern Uusimaa region. The municipality had a population of 1,472 (31 December 2009) and covered an area of of which is water. The population density was .
The municipality was bilingual, with majority (74.9%) being Swedish and minority (23.8%) Finnish speakers. The municipality has previously also been known as Liljentaali in Finnish documents.
Liljendal was consolidated to Loviisa, together with PernÃÂ¥ and Ruotsinpyhtää, on January 1, 2010.
Liljendal was originally the name of a seat farm (säteri) in the village of Sävträsk. Its name may have been derived from that of an old Cistercian monastery in Lower Saxony, Lilienthal. At the time, it was a part of the PernÃÂ¥ (Pernaja) parish. The name got its current meaning when the seat farm and nine villages near it became their own chapel community in 1791. Liljendal became a separate parish in 1914.