This dataset combines annual files from 2005 to 2017 published by the IRS. ZIP Code data show selected income and tax items classified by State, ZIP Code, and size of adjusted gross income. Data are based on individual income tax returns filed with the IRS.

The data include items, such as:

• Number of returns, which approximates the number of households
• Number of personal exemptions, which approximates the population
• Adjusted gross income (AGI)
• Wages and salaries
• Dividends before exclusion
• Interest received

Enrichment and notes:

• the original data sheets (a column per variable, a line per year, zipcode and AGI group) have been transposed to get a record per year, zipcode, AGI group and variable
• the data for Wyoming in 2006 was removed because AGI classes were not correctly defined, making the resulting data unfit for analysis.
• the AGI groups have seen their definitions change: the variable "AGI Class" was used until 2008, with various intervals of AGI; "AGI Stub" replaced it in 2009. We provided the literal intervals (eg. "$50,000 under $75,000") as "AGI Group" in each case to help the analysis.
• the codes for each tax item have been joined with a dataset of variables to provide full names.
• some tax items are available since 2005, others since more recent years, depending on their introduction date (available in the dataset of variables); as a consequence, the time range of the plots or graphs may vary.
• the unit for amounts and AGIs is a thousand dollars.

License: https://www.usa.gov/copyrighted-government-works