The name Velike Lašče literally means 'big Lašče', distinguishing the town from the neighboring village of Male Lašče. The name of the settlements was first attested in written sources in 1145 as Lasis. The medieval transcriptions indicate that the name was originally *Lašiče, an accusative plural form of the patronymicLašič, derived from the name Lah—thus meaning 'the place where Lah's people live'. The name Lah is derived from Vlah and originally referred to the Romanized Celtic population, and later to Romance speakers, including Italians and Uskoks. In the past the German name was Großlaschitz.
Mass graves
Velike Lašče is the site of two known mass graves associated with the Second World War. The Jamnik Woods Mass Grave is located in the woods east of the train station. It contains the remains of civilians and local anti-communist militia members, who were allied with the Italian forces. The Train Station Mass Grave is located in the woods northeast of the train station. It contains the remains of undetermined victims.