What is Carlisle, Pennsylvania?
{{Under construction}} {{Not to be confused with|Carlisle, Massachusetts}} {{Infobox | title = Carlisle, Pennsylvania }} [[File:Carlisle, Pennsylvania (5655598779).jpg|thumb|Carlisle, Pennsylvania]] '''Carlisle, Pennsylvania''' is a [[borough]] and the county seat of [[Cumberland County, Pennsylvania]], [[United States]]. As of the 2020 census, the population was 20,118. == Gallery == <gallery> File:131 E High St Carlisle PA1.jpg|A building in Carlisle PA File:131 E High St Carlisle PA2.jpg|A building in Carlisle PA File:173 W Louther St Carlisle PA1.jpg|A tree in Carlisle PA File:Carlisle, Pennsylvania.jpg|Carlisle PA File:Carlisle, Pennsylvania (5655638669).jpg|Carlisle PA File:Carlisle, Pennsylvania (5655643905).jpg|Carlisle PA File:Carlisle, Pennsylvania (5655659935).jpg|Carlisle PA File:Carlisle, Pennsylvania (5655659075).jpg|Carlisle PA File:Carlisle, Pennsylvania (5655654989).jpg|Carlisle PA File:Old Cumberland County Courthouse Carlisle PA1.jpg|Former courthouse in Carlisle PA File:Carlisle, Pennsylvania (5655651865).jpg|Carlisle PA File:Carlisle, Pennsylvania (5656230270).jpg|Carlisle PA File:Carlisle, Pennsylvania (5655598779).jpg|Carlisle PA File:Carlisle, Pennsylvania (5655668605).jpg|Carlisle PA File:Carlisle, Pennsylvania (5655668167).jpg|Carlisle PA File:East Carlisle, Pennsylvania (51145370142).jpg|East Carlisle PA File:Carlisle, Pennsylvania (5655649897).jpg|Carlisle PA File:Carlisle, Pennsylvania (5655611891).jpg|Carlisle PA File:Carlisle, Pennsylvania (5656243300).jpg|Carlisle PA File:Carlisle, Pennsylvania (5656180984).jpg|Carlisle PA File:Carlisle, Pennsylvania (5656226650).jpg|Carlisle PA File:Carlisle, Pennsylvania (5656235928).jpg|Carlisle PA File:Carlisle, Pennsylvania (5656215116).jpg|Carlisle PA File:Carlisle, Pennsylvania (5656238480).jpg|Carlisle PA File:Carlisle, Pennsylvania (5655669831).jpg|Carlisle PA File:Carlisle, Pennsylvania (5655648129).jpg|Carlisle PA File:Carlisle, Pennsylvania (5655662275).jpg|Carlisle PA File:Carlisle, Pennsylvania (5656173638).jpg|Carlisle PA