ASPEP Technical Documentation
ASPEP Technical Documentation
Every census, survey, and program has technical documentation to assist users with the published statistics.
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ASPEP Code ListsDetailed codes for variables that contain a large number of coded responses, such as ancestry and occupation.
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ASPEP File LayoutsView and download the file layouts for ASPEP.
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ASPEP MethodologyThe methods we use to collect and produce the ASPEP, including sampling, questions, collection, review, quality, weighting, etc.
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ASPEP QuestionnairesHere you will find the most recent questionnaire and whether an archive of past questionnaires is available online.
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ASPEP User NotesLearn more about issues affecting ASPEP, including design, collection, production, and release, to be better informed when analyzing stats.
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Government Classification ManualGovernment Finance and Employment Classification Manual covering the activities of the state and local governments.
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Public Sector: Annual and CoG API DocumentationDetailed description information for variables on the Public Sector API.
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Page Last Revised - June 24, 2026