The Union Cemetery in Arnold, Pennsylvania is located at 2030 Freeport Rd, Arnold, PA 15068, inside Westmoreland County. The phone number for the cemetery is 724-335-4904. The Union Cemetery- often mistaken for being located in New Kensington, rather than Arnold- has a history of use reaching as far back as 1846, and is still an active cemetery to this day. In 2012, it was reported by staff officials there were more than 20,000 burials at this cemetery. Among those memorialized is Lorenzo Freeman, NFL tackle for the Pittsburgh Steelers.