Peshtigo, WI has a population of 3,440 and is the 8,130th largest city in the United States. The population density is 1,141 per sq mi which is 1205% higher than the Wisconsin average and 1160% higher than the national average. The median age in Peshtigo is 47 which is approximately 19% higher than the Wisconsin average of 39. In Peshtigo, 51% of the population over 15 years of age are married, 91% speak English and 6% speak Spanish. 63% of Peshtigo residents were born in Wisconsin, 31% were born out of state, 4% were born outside of the United States and 2% were foreign born.