noun
resident population
Refers to the number of people who live permanently in a given area, as opposed to transient or daytime population.
この町の定住人口は年々減少している。
The resident population of this town is decreasing year by year.
定住人口と観光客の数を比較する。
Compare the number of residents with the number of tourists.
Compound of 定住 (ていじゅう, 'settlement, permanent residence') and 人口 (じんこう, 'population').