In 2022, the population of Portis was 89, a 1.14% increase year-by-year from 2021. Previously, in 2021, Portis's population was 88, a decline of 1.12% compared to a population of 89 in 2020.
The median age in Portis, KS is 33.5, as per 2021 ACS 5-Year Estimates. Of the total population, 20.47% were under the age of 15, 16.37% aged 15 to 29, 54.39% aged 30 to 64, 8.77% aged 65 to 84, and 0.00% were 85 years of age and older.