Ralston is a city in Douglas County, Nebraska, United States. The population was 6,314 at the 2000 census. Ralston is geographically surrounded by Omaha, Nebraska but is a separate city. Since Ralston's population is below 10,000, state law technically allows for Omaha to forcibly annex Ralston. Omaha officials have never expressed a desire to do so. An agreement was signed with Ralston's then-mayor, Wendell Kronberg, in the late 1960's whereby Omaha would leave Ralston alone. Ralston apartments for rent comparison page shows most up to date rent information on Ralston apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.