Black Jack is an unincorporated community in Douglas County, Kansas, United States.
[2] Black Jack was founded in 1857, and named after nearby Black Jack Creek.
[3] The creek was named for the Blackjack Oak trees along its course.
[4] A post office was established at Black Jack in 1858, and remained in operation until 1895.
This article about a location in Douglas County, Kansas is a stub.