Wisconsin is located in the northern part of the United States, near the Great Lakes. The land area is 14.53 square kilometers and the population is about 5.45 million. The capital of the state is Madison. The zip code abbreviated code is WI. The characteristic industry in Wisconsin is dairy cattle. There are many plains here, which are very suitable for cattle grazing. The milk and cheese produced here are the first in the United States. Second, the state is also a paper-making place, with numerous forestry industries that produce a lot of paper. Because of the terrain, agriculture in the state is also quite developed, and manufacturing is certainly not bad. In terms of transportation, water transportation in Wisconsin is very good, with direct access to the Great Lakes and finally to the Atlantic Ocean. Superior City, Green Bay City and Milwaukee are all famous port cities. Milwaukee has a large international airport and is also very convenient, and air transportation is developed. Wisconsin is abbreviated WI, the area code is 262 - 414 - 608 - 715 - 920, and the main city zip codes are: Madison 53701-53794; Milwaukee 53201-53295 ; Racine 53401-53490.