Houston Township is located in the U.S. state of Illinois. It is within Adams County. It has a total area of 37.94 square miles at 40°08′36″N 91°05′24″W. The elevation is 692 feet above sea level. As of the 2010 census data, it had a total population of 221. Recent job growth is negatively decreased by 0.13 percent. The average travel time is 29 minutes. It has Zip codes 62316, 62320, 62339, 62346, and 62349.