Harper is located in Harper County, Kansas. Harper has a 2025 population of 135 . Harper is currently declining at a rate of 0% annually and its population has increased by 1.5% since the most recent census, which recorded a population of 133 in 2020.
The median age in Harper is 51.7 years: 53.1 years for males, and 48.4 years for females. For every 100 females there are 71.7 males.
Data after 2023 is projected based on recent change
The racial composition of Harper includes 86.41% White, and smaller percentages for and multiracial populations.
White (86.41%)
Two or more races (13.59%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 89 | 86.41% |
| Two or more races | 14 | 13.59% |
Married
Widowed
Divorced
Separated
Never Married