 The per capita income for the city was $20,132.About 6.6% of families and 10.2% of the population were below the poverty line, including 13.6% of those under age 18 and 9.1% of those age 65 or over.Father Jacques Marquette, one of the first Jesuit missionaries to the Great Lakes Indians, may have died and been buried in Frankfort in May 1675.