Now, according to The Kansas City Business Journal, Wyandotte County ranks as the youngest county.
Interesting bit:
Looking at Wyandotte County’s 2010 population of 157,505, 8.71 percent were children ages 0 to 4. That’s good for a 118th-place ranking nationally and the highest in the metro area. Almost 35,000 WyCo residents (22.21 percent) were ages 5 to 19.