Grass Patch is a small town and locality in the Goldfields-Esperance region of Western Australia, located 79 km north of Esperance on the Coolgardie-Esperance Highway.

[4][5] The townsite was proposed in 1910 when land in the area was being opened up, and as a watering spot for the planned Esperance to Norseman railway,[2] which was completed 15 years later.

The poor quality of the soil in the surrounding district made the development of farming in the area difficult and unproductive.

[7] The addition of these trace elements to the soil has since improved fertility and crop yields a great deal, and the region has become an important agricultural district, successfully producing wheat, barley, canola, sheep and cattle.

[8] The townsite of Red Lake, in the north of Grass Patch, on the Coolgardie-Esperance Highway and the railway line, was gazetted in 1922.