Tehuantepec is a city and municipality in the southeast of the Mexican state of Oaxaca. It is part of the Tehuantepec District in the west of the Istmo Region. The area was important in pre-Hispanic period as part of a trade route that connected Central America with what is now the center of Mexico. Later it became a secondary capital of the Zapotec dominion, before it was conquered by the Spanish in the early 16th century.

The Union of Indigenous Communities of the Isthmus Region is a farmer's cooperative in the state of Oaxaca, Mexico. It was established in 1982 to assist in production, marketing and distribution of locally produced coffee and other products. UCIRI was a pioneer of organic coffee production and one of the first fair trade suppliers.