The total population of Promise City is estimated to be 80 with 32 males (40.00%) and 48 females (60.00%). There are 16 more females than males in Promise City.
In 2022, the population of Promise City was 89, a 0.00% decrease year-by-year from 2021. Previously, in 2021, Promise City's population was 89, a decline of 0.00% compared to a population of 89 in 2020.
The median age in Promise City, IA is 55.6, as per 2021 ACS 5-Year Estimates. Of the total population, 12.37% were under the age of 15, 0.00% aged 15 to 29, 64.95% aged 30 to 64, 20.62% aged 65 to 84, and 2.06% were 85 years of age and older.