Rancho de Santa Fe in northern San Diego is Southern California, a small town 48 kilometres and a population of less than 5000, the United States is the richest small town.

• 兰乔圣菲是美国南加州圣迭戈北部48公里处的一个小镇，人口不足5000 ，却是美国最富裕的小镇。