The 46.2-mile (74.4 km) long stream is a tributary of Great Miami River.
Twin Creek was so named by the Potawatomi Indians on account of its branches.
[2] At its mouth, the creek's estimated mean annual flow rate is 323.2 cubic feet per second (9.15 m3/s).
[3] A USGS stream gauge on the creek near Germantown recorded a mean annual discharge of 286.2 cu ft/s (8.10 m3/s) during water years 1921-2019.
The highest daily mean discharge during that period was 8,450 cu ft/s (239 m3/s) on January 22, 1959.