Spring Lake township represents an area within the Spring Lake township subdivision of the Hanson County (South Dakota),
which is not part of any official city, town or other place of the Spring Lake township subdivision.
This area is populated by approximatelly 121 people and occupies the area of 38 square miles - 1 square miles represent water areas.
Racial makeup of the population is : White (97.52%), Two or More races (2.48%) and Some Other Race (0%).
The male part of the population has a median age of 44 and the “median female” is 45 years old.
Statistical data for the Spring Lake township based on the 2010 U.S. Census