Population Growth
Nampa was incorporated as a city in 1891; in the 1890 census it had a population of 847 (www2.census.gov). Thirty-ninth of 77 cities at that time and with a population density of 25.298/mi2, Nampa has grown into the 3rd most populated of 201 cities with a population of 100,200 (www.census.gov), giving it a population density of 2,992.831/mi2.
Income and Rurality
The state of Idaho had an overall population density of 1.071/mi2 in 1890, and 22.253/mi2 in 2020, so Nampa has always been far from the general rurality of Idaho. Nampa's per capita income 2017-2021 (in 2021 dollars) was $25,016 (www.census.gov), which compared to the state's $31,509 (www.census.gov) puts Nampa's individual earnings at ~79% of Idaho's overall.