The Black Oak township is a subdivision of the Mahaska County, in the state of Iowa.
This subdivision represents an area of 34 square miles - 1 square miles are water areas.
There are 1 cities, towns or villages in the Black Oak township subdivision - their combined population count is 162.
Approximatelly 591 people live in “Remainders” areas, that are officially not part of any city or town.
Total population of the subdivision is 753.
Racial makeup of this subdivision is as follows : White (99.87%),
followed by Two or More races (0.13%) and Some Other Race (0%).
Median age for the male population is 39 and 40 for the female part.
Statistical data for the Black Oak township based on the 2010 U.S. Census