With a population of 840 at the 2000 census, Heidelberg is a 'home town' kind of place where you'll come to know most everyone. Enjoy the best of two worlds. Our town is a pleasant place to live, rural yet near all the 'city benefits' one could require. Heidelberg has a cost of living that is only 71% of the national average. According to the "United States Census Bureau", the town has a total area of 5.1 sq. miles. Most of it is land and 0.04 sq miles of it (0.39%) is water. The city also has a great climate. There is an average high temperature of 60 degrees in January and February. There is also convenient accessibility to state highways, airports, and larger cities.