The arrondissement of Pau is an arrondissement of France. It is part of the Pyrénées-Atlantiques département. Its capital, and préfecture of the department, is the city of Pau.

It is the northernmost of the arrondissements of the department, with an area of 2,490 square kilometres (961 square miles), the second in area of the department. It is the most populated arrondissement with 305,089 inhabitants and a population density of 122.5 inhabitants/km².