San Joaquín is a municipality in the central Mexican state of Querétaro.

[1] Before the Spanish, the site at "Ranas" was a mining center, principally for cinnabar which was used as a pigment.

[2] In 1622 the village of "San Nicolás Tolentino en el Paraje de las Rana" was founded.

[1] In 1724 Viceroy Juan de Acuña, 2nd Marquis of Casa Fuerte granted the first land in the municipality.

[1] The municipality of San Joaquín covers an area of 275 km², and is located between 99° 22' and 99° 39' West longitude, and between 21° 07' and 20° 53' North latitude.