The township is located on the very southern edge of Butler County next to Allegheny County. Major north and south arterial routes connect Mars with Pittsburgh. Small rural communities tend have an elderly population. The predictable out-migration of the young is due to a lack of viable economic opportunities.
Recent data show a slight increase in population.
Growth, I believe, will continue to be gradual for a while, but as in nearby Cranberry Township the area will enjoy an economic and population boom over the next 20-25 years. This will occur when the developers of residential complexes and the service industry recognize the potential of Mars and its major transportation links. Block group 9124-6 is the primary residential area of Mars, and also the major area of employment. Housing varies in age from recent construction to houses 35-100 years of age, which predominate. The primary employers are educational and social welfare endeavors.