Neighborhoods in the 51109 ZIP Code

Tucked against the South Dakota border, Northwest Sioux City is best known for its rugged, rural surroundings. Made up largely of rolling Loess Hills, housing sites are limited to a few level areas. "So much of it is basically untouched because it's not flat enough to be developed," says Kathryn Pfaffle, a Realtor with Realty One Group Regency.

Set in the gentle hills that surround the area, the West Side is one of the oldest communities in Sioux City. A former factory district, the West Side is now almost exclusively residential, though the older sections of town still retain the tightly spaced layout of industrial neighborhoods. As it expanded, the West Side absorbed areas with more