Langezwaag () is a village in the municipality of Opsterland in the east of Friesland, the Netherlands. It had a population of around 1,365 in January 2017.
The village was first mentioned in 1315 as Utresuagh, and means "long meadow with caddle". Lange (long) has been added to distinguish from . Kortezwaag was annexed by Gorredijk in 1962 and is now a neighbourhood. The Dutch Reformed church was built in 1781 as a replacement of a medieval church.
Langezwaag was home to 956 people in 1840.