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. Temperatures range from 3°C to 36°C. Much of the area has been deforested and rainfall has decreased in recent years, affecting production of the standard crops of corn, wheat, beans and barley. It is the traditional home of the Chocho people, although they are now a small minority. The population has been shrinking due to emigration for economic reasons.