Welcome to Maricopa County, the 4th populous county in the nation with over 13,000 employees working together to continually improve residents quality of air, environment, public health, human services, animal shelters, roads, planning & development, elections, courts, parks, and more.

Maricopa County is one of the nation's fastest growing counties, home to approximately four and a half million people. We believe in service that helps you solve a problem, move forward with a project, manage a difficult situation, or simply check something off your list.

Find the most frequently visited departments, elected offices, and courts in Maricopa County.

The Maricopa County Assessor's Office now offers electronic notices, eNotices, for your Notice of Valuation.

The nation’s 4th largest county in terms of population; 2022 population of 4.5 million people, according to U.S. Census Bureau; Makes up more than half of Arizona’s population; Fastest-growing county in the United States, with more than 56,000 people added between July 2021-2022 ; https://www.census.gov/quickfacts/maricopacountyarizona

The Maricopa County Recorder’s Office processes and preserves deeds, plats, and a variety of other important documents. We offer our customers the latest in innovation and convenience through our award-winning in-person and digital recording services.

The Judicial Branch of Arizona in Maricopa County, Arizona - comprised of Superior Court, Adult Probation, and Juvenile Probation, including juvenile detention - provides information on court proceedings, jury service, locations, court forms, and more.

Maricopa County is staffed with over 13,000 employees in more than 50 departments and agencies representing a diverse and talented workforce. Visit our employment site to see current job opportunities within Maricopa County.

301 West Jefferson Street Phoenix, Arizona 85003 Main Line: 602-506-3011 ADA Compliance

The Maricopa County Treasurer’s Office is to provide billing, collection, investment, and disbursement of public monies to special taxing districts, the county, and school districts for the taxpayers of Maricopa County, so the taxpayer can be confident in the accuracy and accountability of their tax dollars.