Santiago Tepetlapa is a town and municipality

Municipalities of Mexico State

The Mexican state of Mexico is made up of 125 municipios :-External links:* Estado de México / State of Mexico...

 in Oaxaca

Oaxaca

Oaxaca , , officially Estado Libre y Soberano de Oaxaca is one of the 31 states which, along with the Federal District, comprise the 32 federative entities of Mexico. It is divided into 571 municipalities; of which 418 are governed by the system of customs and traditions...

 in south-western Mexico

Mexico

The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

. The municipality covers an area of km².
It is part of the Coixtlahuaca district

Coixtlahuaca District, Oaxaca

Coixtlahuaca District is located in the northeast of the Mixteca Region of the State of Oaxaca, Mexico. As of 2005 the population was 9,018, down 2.8% from 2000.The region is generally from 2,000m to 3,000m high, mostly hilly or mountainous with small plains....

 in the Mixteca Region

Mixteca Region, Oaxaca

The Mixteca Region is a region in the state of Oaxaca, Mexico, part of the broader La Mixteca area which covers parts of the states of Puebla, Guerrero and Oaxaca....

.

As of the 2010 census, the town (locality) had a population of 101 inhabitants, while the municipality had a total population of 131 inhabitants. It is the second-smallest municipality in Mexico in population, larger than only Santa Magdalena Jicotlán

Santa Magdalena Jicotlán

Santa Magdalena Jicotlán is a town and municipality in Oaxaca in south-western Mexico.It is part of the Coixtlahuaca district in the Mixteca Region.The municipality covers an area of 48.48 km², surrounded by the Sierra Madre Oriental....

, also in Oaxaca.