Callahan Creek is a stream in Boone County in the U.S. state of Missouri.
[2] The stream headwaters arise in northwest Boone County just southeast of Harrisburg adjacent to Missouri Route 124 (at 39°08′19″N 92°27′28″W / 39.13861°N 92.45778°W / 39.13861; -92.45778[1]) and it flows south to southeast to its confluence with Perche Creek (at 38°58′51″N 92°24′37″W / 38.98083°N 92.41028°W / 38.98083; -92.41028[1]) about one half mile north of I-70 at the northwest corner of Columbia.
[1] The creek's name is a corruption of the last name of William Callaham, a pioneer settler.
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