Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Madison Township is one of twelve townships in Jay County, Indiana, USA. As of the 2000 census, its population was 608. Madison Township covers an area of 30.84 square miles (79.87 square kilometers); of this, 0.01 square miles (0.04 square kilometers) or 0.05 percent is water. The streams of Mad Run, Madison Creek, Speed Run and Walnut Creek run through this township.