Citizens can access information about Maricopa County's revenues and expenditures through the official Maricopa County OpenBooks transparency website.

Openbooks is the official transparency website of the State of Arizona, created in compliance with Arizona Revised Statute (A.R.S.) Section 41-725. It is a searchable, user-friendly public site that serves as a single point of reference for citizens to view information about the financial activities within the State of Arizona, including many counties, cities and towns, as well as state universities, community colleges and local school districts.