Pascal Poirier (February 15, 1852 – September 25, 1933) was a Canadian author, lawyer, and the all-time longest-serving Senator.Born in Shediac, New Brunswick, he wrote books on Acadian history and language. The Pascal Poirier House (c. 1820–30) was designated a Provincial Historic Site under the Historic Sites Protection Act. The home he was born in has been preserved as a museum and as an important and rare example of early-19th-century Acadian residential construction.