WEBAbout. In 2021, Peru, NE had a population of 833 people with a median age of 21.2 and a median household income of $36,326. Between 2020 and 2021 the population of Peru, NE declined from 845 to 833, a −1.42% decrease and its median household income declined from $41,500 to $36,326, a −12.5% decrease.