Porrentruy District (German: Bezirk Pruntrut, French: District de Porrentruy) is one of the three districts of the canton of Jura, Switzerland. Its capital is the town of Porrentruy. The French-speaking district has a population of 24,276 (as of 31 December 2020).

Porrentruy is divided into a total of 20 municipalities:

The blazon of the district coat of arms is Gules a Fess Argent, overall a Cockatrice Or volant holding in legs and beak a Crosier of the same.

Porrentruy has a population (as of December 2020) of 24,276. Most of the population (as of 2000) speaks French (22,008 or 91.8%) as their first language, German is the second most common (1,001 or 4.2%) and Italian is the third (306 or 1.3%). There are 8 people who speak Romansh.