- What is now known as The Human Services Department originally began as the Community Services Department.
- The Department originally had three operating divisions: Head Start, Manpower Employment Training Programs, and Aging Services.
- Head Start began as a summer program, educating children ages 3 to 5. Manpower managed adult and summer youth programs as well as migrant farm worker programs.
- The County created a community services commission designated as the Community Action Agency to serve all of Maricopa County, outside the City of Phoenix.
- The Community Services Division, under the Community Services Department, administered the new Community Action Program (CAP) to 14 local communities.
- The Comprehensive Employment and Training Act (CETA) replaced the Manpower Division with Maricopa Employment and Training Administration (META).
- The Department name was changed to Human Resources.
- It was comprised of four Divisions: Head Start, Community Services, META, and Special Transportation Services. In a reorganization, the state assumed management over Aging Services.
- The new Job Training Partnership Act (JTPA) replaced META with the Employment and Training Division.
- The Department name was changed to Social Services and still operated four divisions: Head Start, Community Services, Special Transportation Services, and Employment and Training.
- The Department was renamed to the Human Services Department.
- Restructuring left the department operating three divisions encompassing various programs: Education (Head Start); Community Services (CAP and Special Transportation Services); and Employment and Training (JTPA services.)
- The City of Mesa was designated as its own Community Action Agency, separate from the Community Services Division.
- The Early Head Start program was created to serve children from birth to age five and their families.
- The Employment and Training Division received funding to implement the One-Stop Career Center system.
- The Employment and Training Division was renamed to the Workforce Development Division.
- The Job Training Partnership Act (JTPA) was replaced by the Workforce Investment Act (WIA).
- The Special Transportation Services Division became a partner with the One-Stop Centers and moved into the Workforce Development Division.
- The Special Transportation Services program discontinued providing regional transportation services.
- The Community Development Department was merged into the Human Services Department. This new Division administered programs that increase affordable housing and build stronger and more resilient communities.
- The Department now consisted of four divisions: Education, Community Development, Community Services, and Workforce Development.
- The Community Justice Support Services Division is created with the purpose of providing prevention and intervention services to youth and adults who are at-risk within the Criminal Justice system.
- The Maricopa County Leadership Experience program is added to the Workforce Development Division. This summer program for youth is a no cost self-directed, self-paced program with activities, workshops, and volunteer opportunities within more than 16 County departments.
- The Weatherization Program which provides homeowners with assistance in energy and efficiency and the Emergency Solutions Grant (homeless assistance) were moved under the Community Development Division.
- The Senior and Adult Services Division was created.
- Administration, Policy, and Planning Division was created, bringing a total of six Division to HSD.
- The Community Development Division was renamed Housing and Community Development to reflect the Division's true scope of work.
- The Early Education Division received a 5 year grant to continue operating in the East Valley while offering longer classroom days for children.
- HSD embraced the 2-Generational Approach leading to several cross-divisional initiatives and partnerships.