Lewellen is a village in Garden County, Nebraska, United States.

According to the United States Census Bureau, the village has a total area of 0.37 square miles (0.96 km2), all land.

[4] The site of the September 1855 Battle of Ash Hollow (also called the Battle of Blue Water Creek and Harney Massacre), part of the First Sioux War, is near the modern-day settlement of Lewellen.

The United States Army, with 600 troops under the command of William Selby Harney, made a surprise punitive attack on a Brule Sioux encampment led by Chief Little Thunder, in retaliation for the Grattan incident.

[5][6] Samuel P. Delatour arrived in the area in 1884, founding a ranch at Blue Creek.

[7] Lewellen was platted (laid out) in 1906, around the time the railroad was extended to that point.

[7] It was named for Frank Lewellen, who arrived in the area in 1886 and established a small store and post office.