The name Brook came from people in the early 1830’s settling two or three miles south of the present town of Brook where two creeks met. The two creeks are now called Hunter and Darroch Ditch. The first Courthouse and Post office was located in this area. This area was part of Jasper County. Newton County split off to become Indiana’s 92 and last county in 1859.
One of the first settlers in the area was Samuel Benjamin. In 1852 or 1853 he purchased 240 acres from the Wabash and Erie Canal on the north side of the Iroquois River in the SE quarter and the east half of the SW quarter of section 18 of Twp. 28, R.8. This land was tall grass Prairie. On June 26, 1856 Samuel Benjamin plated the present town of Brook on this spot.