In 2019, the most expensive zip code in Texas was 78701, which was located in Austin, and renters paid on average 2,885 U.S. dollars per month for apartments there. Most of the most expensive zip codes in Texas were located in either Austin or Dallas.

This annual study provides selected income and tax items classified by State, ZIP Code, and the size of adjusted gross income. These data include the number of returns, which approximates the number of households; the number of personal exemptions, which approximates the population; adjusted gross income; wages and salaries; dividends before exclusion; and interest received. Data are based who reported on U.S. Individual Income Tax Returns (Forms 1040) filed with the IRS. SOI collects these data as part of its Individual Income Tax Return (Form 1040) Statistics program, Data by Geographic Areas, ZIP Code Data.