Callensburg is a borough located in Clarion County, Pennsylvania. Callensburg has a 2026 population of 141. Callensburg is currently declining at a rate of -2.08% annually and its population has decreased by -3.42% since the most recent census, which recorded a population of 146 in 2020.
The median household income in Callensburg is $61,875 with a poverty rate of 1.71%. The median age in Callensburg is 58.2 years: 60 years for males, and 50.8 years for females. For every 100 females there are 105.3 males.