Jeff township represents an area within the Jeff township subdivision of the Oregon County (Missouri),
which is not part of any official city, town or other place of the Jeff township subdivision.
This area is populated by approximatelly 346 people and occupies the area of 29 square miles - 1 square miles represent water areas.
Racial makeup of the population is : White (99.13%), Two or More races (0.58%) and Asian (0.29%).
The male part of the population has a median age of 48 and the “median female” is 44 years old.
Statistical data for the Jeff township based on the 2010 U.S. Census