Gilgai is a town in the Northern Tablelands region of New South Wales, Australia.

[2] The area around Gilgai is dotted with mine shafts that are unique in Australia.

They are known as 'concertina shafts' because the seams of tin bearing ore were in a zigzag pattern and were mined accordingly.

The precious stones found here include sapphires, rubies, and some diamonds.

Gilgai has a public school which was built in 1878 from bricks baked on-site.