Blacklick Creek is a tributary stream of Big Walnut Creek in Ohio, flowing through Licking, Fairfield and Franklin counties.

[4] The 27 mile long rock and slate bed creek has its headwaters near Mink Street in Jersey Township, in northwestern Licking County.

The stream meets Big Walnut Creek in Columbus, near South Hamilton Road at 39°52′55″N 82°54′24″W / 39.881865°N 82.9066°W / 39.881865; -82.9066.

Blacklick Creek topped a levee on September 14, 1979, due to heavy rains from Hurricane Frederic.

The creek flooded the Municipal Building in Reynoldsburg, and three hundred homes in Blacklick Estates.