Maricopa County Adult Probation, Phoenix, Arizona. 38 likes. Government Organization5/5(2). The Judicial Branch of Arizona in Maricopa County is dedicated to providing a safe, fair and impartial forum for resolving disputes, enhancing access to our services, and providing innovative, evidence based programs that improve the safety of our community and ensure the public's trust and confidence in the Judicial Branch. The Maricopa County Adult Probation Department monitors offenders, as well as provides field supervision services. Located in Phoenix, the department offers motivational enhancement and treatment services related to substance goodpublications.infoon: E Garfield St, Phoenix, , AZ.