Mars is a borough in southern Butler County, Pennsylvania, United States.

Parks decided to have a post office placed in his home, so he received help from his friend Samuel Marshall to help establish it.

[3] In 1877, the Pittsburgh, New Castle and Lake Erie Railroad was constructed through Overbrook, and had a station built there.

Some say it was Parks's wife who enjoyed astronomy, while others believe it was shortened after Samuel Marshall's name.

In 1904, the Pittsburgh and Butler Street Railway gained permission from Mars to construct its right-of-way through the borough.

The bell of the USS Mars was loaned to the borough and has become a part of a memorial in the downtown park.

According to the United States Census Bureau, the borough of Mars has a total area of 0.5 square miles (1.2 km2), all land.

Founded in 1917, the parish was originally located in downtown Mars, but by the early 2000s (decade), membership had swelled so much that a new facility was constructed just outside the neighboring Seven Fields borough along PA 228 in 2008.

[1] The Serbian Orthodox Eparchy of Eastern America previously had its headquarters in Adams Township, near Mars.

Because of its unique name, and proximity to Pittsburgh, Mars has on occasion received national media attention.

Canadian musician John Southworth named his first album Mars, Pennsylvania after the town, which he had passed through many years earlier on a school trip.

The Mars Fightin' Planets are one of the many teams located in the north Pittsburgh area.

It makes occasional rounds to Austin's Bleach in Downieville and to a small transfer with the Allegheny Valley Railroad in Bakerstown.

The AVR will also on occasion bring long loads of railcars through Mars to Harmony Junction in Eidenau.

Commuters on PA 228 can easily reach Interstate 76 (Pennsylvania Turnpike) via I-79 or US 19 in Cranberry Township.