Are you sure children are included? “The Census calculates per capita income by taking the total income for the previous year for everyone 15 years and older.” - https://www.thebalance.com/income-per-capita-calculation-and...

The census specifically doesn’t ask for income for children below 15, so perhaps that is the meaning of the sentence above, and per capita calculation does include kids as $0 income for calculating median - although that would be weird IMHO. Unclear, and I got bored looking for exact details, so gave up quickly!