Institution libraries serve a residential population in a correctional facility where access is limited. Examples are the Anamosa State Penitentiary and the Cherokee Mental Health Institute.
State Agency libraries are libraries established by a specific state government department. Examples are Iowa departments of transportation, archives, and natural resources.
Academic libraries serve the student and faculty population at a public or private institute of higher education. Examples are Allen College and Clinton Community College.
School libraries serve grades K-12 students and faculty at a public or private education entity. Examples are Clarion-Goldfield High School, and Tipton K-8 Media Center.
Special libraries provide specialized collections and services to employees and personnel at a company. Examples are hospital libraries and the National Czech & Slovak Museum & Library and the Rockwell Collins Information Center.
AEA libraries are media centers established within the Iowa Area Education Agencies.
Public libraries serve the general public and are categorized according to the population of their jurisdiction.