Illiturgis, also known as Iliturgi, was a city in Spain during antiquity, located on the road from Corduba to Castulo. Originally, it was located near the site of Mengíbar, but when it was destroyed the populace was relocated near present-day Andújar. It had the surname of Forum Julium during Roman times.

Castulo was an Iberian town and bishopric (now Latin titular see located in the Andalusian province of Jaén, in south-central Spain, near modern Linares.