The municipality of San Pedro Lagunillas is located at the following extreme coordinates: from parallel 20° 59’ to 21° 20’ latitude north and from meridian 104° 37’ to 104° 54’ longitude west.
With the arrival of the Spanish the place was rebaptized with the name of San Pedro Lagunillas to honor the first Count of Miravalle, Pedro Alonso Dávalos Bracamonte y Uibarri, who provided the resources for the construction of the church and in reference to the lakes of clear water found in the region.
Due to the seasonal nature of the agriculture there has been intensive emigration in the last twenty years, especially to the United States of America.
The main tourist sights are the two lakes of San Pedro and Tepetiltic.
There is also a small museum in the town with displays of pre-Columbian artifacts.