Editor’s Note: The Business Journals evaluated almost 33,200 ZIP codes to compile its new wealth index. The wealthiest ZIP codes rankings are intended to capture the greatest concentrations of wealth. ABJ’s 2025 list of the area’s wealthiest ZIP codes takes a look at the six counties that make up the Austin area: Travis, Williamson, Hays, Bastrop, Burnet and Caldwell. The online version of this list expands beyond the top 45 ZIP codes in print to feature a total of 85 ZIP codes in the Austin coverage area. The Business Journals’ rankings are derived from a weighted calculation that relies on multiple datapoints and demographics. Consideration is given to population density as well as income, home equity, estimated savings and poverty rates to identify ZIP codes with the greatest concentrations of wealth per capita. Information on The List was obtained from the five-year version of the Census Bureau’s 2023 American Community Survey and the Zillow Home Value Index for May 2025. ZIP codes with populations less than 1,000 or a land area of less than 0.5 square miles are not included. Areas without complete data also were removed. About 21,900 ZIP codes were factored in based on these criteria. This week’s List is part of a shift in our research methodology and philosophy in 2025, one that will emphasize more data and context for readers while better coordinating the resources available to us and our 46 sister publications under the American City Business Journals flag. We anticipate this effort will identify thousands of new local records — and cumulatively, tens of thousands of new businesses across ACBJ’s footprint — this year alone. For information about this and other ABJ Lists, please contact Patricia Rogers at progers@bizjournals.com