Haller Lake is a small lake and neighborhood in north central Seattle, Washington, named for Theodore N. Haller, who platted the neighborhood in 1905. His father, Granville O. Haller, was one of Seattle's early settlers, an army officer who amassed a large estate in the region. The lake was formed as a result of a block of ice left behind by a retreating glacier. When the ice melted, a depression was left in the ground that was then filled with water.