First five from a list of the ten most illiterate cities w/pops above 25,000: El Paso, Corpus Christi, Long Beach, Calif., Detroit, and San Antonio.
See a pattern there? For the other five ignorance oases, see Wiki.answers. There has been a recent hoohah about Laredo losing its only bookstore. The few readers in that poor benighted border town are protesting, but why should a bookstore continue business in a city where nobody much reads? Texas leads the way in ignorance, sweeping all before us.