Of all the municipalities in the state, 97% are accessible. Of the 7,210 communities registered in the 1990 census, 29% have paved or surfaced roads, 20% are dirt roads with restricted transit, and approximately 50% have no overland access. This latter category includes communities with 452,934 inhabitants in 17 municipalities.7 In general, building and maintaining the network of highways and terraces is a serious problem for the state, since the climate, geography, and dispersion of the communities makes such work difficult. In late 1994 the government financed the Oaxaca-Tehuacán super-highway, which reduces the drive to Mexico City to just five hours.

Some 7,000 localities have telephone access (in most cases one phone booth per pueblo). In addition, there are 209 telegraph offices and 879 postal offices.