Preston is a village in Richardson County in Southeastern Nebraska, United States. It is located within the Sac and Fox Reservation. The population was 19 at the 2020 census. The Sac Post Office, established in 1874, was named for the Sac and Fox Indian tribes that live in this area. The offspring of mixed marriages were given land on the Half-Breed …Preston is a village in Richardson County in Southeastern Nebraska, United States. It is located within the Sac and Fox Reservation. The population was 19 at the 2020 census. The Sac Post Office, established in 1874, was named for the Sac and Fox Indian tribes that live in this area. The offspring of mixed marriages were given land on the Half-Breed Tract. Some of their descendants still live there, while others sold their land and moved on.