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 (as they did with Elkhorn, another nearby city, in 2007, and had previously done with Millard). Omaha officials have never expressed a desire to annex Ralston; an agreement had been signed with Ralston's then-mayor, Wendell Kronberg, in the late 1960s whereby Omaha would leave Ralston alone.