MIREPOIX, a city of France, in the department of the Upper Garonne and arrondissement of Pamiers. It is situated on the river Lers, in a district rich in good wine, and contains 450 houses, with 3100 inhabitants. In the neighbourhood a large quantity of jet is found, the procuring and polishing of which is said to employ one half of the population. Long. 1. 47. E. Lat. 43. 7. N.