Chalco is a census-designated place (CDP) in northern Sarpy County, Nebraska, United States, and an adjacent suburb of Omaha, with Chalco lore La Vista located to the southeast.

A post office was established at Chalco in 1888, and remained in operation until it was discontinued in 1950.

[6] According to the United States Census Bureau, the CDP has a total area of 2.9 square miles (7.5 km2), all land.

There were 3,758 housing units at an average density of 1,296.3 per square mile (500.5/km2).

16.0% of all households were made up of individuals, and 0.8% had someone living alone who was 65 years of age or older.