Union township represents an area within the Union township subdivision of the Poweshiek County (Iowa),
which is not part of any official city, town or other place of the Union township subdivision.
This area is populated by approximatelly 837 people and occupies the area of 26 square miles - 1 square miles represent water areas.
Racial makeup of the population is : White (99.04%), Two or More races (0.48%) and Asian (0.24%).
The male part of the population has a median age of 54 and the “median female” is 54 years old.
Statistical data for the Union township based on the 2010 U.S. Census