La Platte is a census-designated place (CDP) in Sarpy County, Nebraska, United States. As of the 2020 census, La Platte had a population of 50.
La Platte was laid out in 1870. It was named from the Platte River.
A post office was established at La Platte in 1871, and remained in operation until it was discontinued in 1955.
According to the United States Census Bureau, the CDP has a total area of , of which is land and is water.
As of the census of 2010, there were 114 people living in the CDP. The population density was 142.91 inhabitants/ km. Of the 114 inhabitants, La Platte was composed of 91.23% white, 0% were African-American, 4.39% were Native American, 0% were Asian, 0% were Pacific Islanders, 3.51% were from other races and the 0.88% belonged to two or more races. Of the total population 6.14% were Hispanic or Latino of any race.