Lake Arthur is a town in Chaves County, New Mexico, United States.

[4] Lake Arthur is located near the southern border of Chaves County about 1 mile (1.6 km) west of the Pecos River.

According to the United States Census Bureau, the town has a total area of 0.54 square miles (1.4 km2), all of it land.

In 2018, it was revealed that billionaire Robert Mercer (owner of Breitbart News, Cambridge Analytica, and others) was a volunteer policeman with Lake Arthur Police Department from 2011.

Mercer also obtained police badges (old-fashioned stars) for bodyguards working for the Koch brothers and Breitbart news.