Portage is a city located in Columbia County Wisconsin. It is also the county seat of Columbia County. With a 2020 population of 10,319, it is the 91st largest city in Wisconsin and the 3026th largest city in the United States . Portage is currently declining at a rate of -0.39% annually and its population has decreased by -0.05% since the most recent census, which recorded a population of 10,324 in 2010. Portage reached it's highest population of 10,481 in 2017. Spanning over 10 miles, Portage has a population density of 1,158 people per square mile.
The average household income in Portage is $63,811 with a poverty rate of 12.64%. The median rental costs in recent years comes to $770 per month, and the median house value is $125,200. The median age in Portage is 36.6 years, 35.1 years for males, and 38.8 years for females.