Spangle is a city in Spokane County, Washington, United States. The population was 278 at the 2010 census. The name comes from Willia…Spangle is a city in Spokane County, Washington, United States. The population was 278 at the 2010 census. The name comes from William Spangle, an early pioneer. Spangle was first settled in 1872 by William Spangle. Later that same year, Spangle's two children planted a tree, marking the settlement of their new community. They affectionally named the tree "Branchy." To this day Branchy stands tall in the center of town. The townsite was platted in 1879. It was incorporated in 1888.