Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delaware
District of Columbia
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
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Louisiana
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Maryland
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Pennsylvania
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming
Other

California
California Association of Licensed Investigators 

Colorado
 Professional Private Investigators Association of Colorado

Florida
Florida Association of Licensed Investigators
South Florida Investigators Association

Illinois
Associated Detectives of Illinois

Indiana
Indiana Society of Professional Investigators, Inc.

Kansas
Kansas Association of Private Investigators 

Kentucky
Kentucky Professional Investigators Association

Louisiana
Louisiana Private Investigators Association

Maryland
Professional Investigators Alliance of Maryland
 

Massachusetts
Licensed Private Detectives Association of Massachusetts

Michigan
Michigan Council of Private Investigators

Minnesota
Minnesota Association of Private Investigators

Mississippi
Mississippi Professional Investigators Association

New Hampshire
New Hampshire League of Investigators, Inc

New Jersey
 Private Detectives Association of New Jersey

New York
Associated Licensed Detectives of New York

Ohio
Ohio Association of Security and Investigation Services

Ohio Investigators Association

Oklahoma
Oklahoma Private Investigators Association

Oregon
Oregon Association of Legal Investigators
 

Pennsylvania
Pennsylvania Association of Licensed Investigators

South Carolina
South Carolina Association of Legal Investigators

Tennessee
Tennessee Professional Investigators Association

Texas
Texas Association of Licensed Investigators

Utah
Private Investigators Association of Utah, Inc

Virginia
Private Investigators Association of Virginia

Washington
Washington Association of Legal Investigators

Wisconsin
Professional Association of Wisconsin Licensed Investigators

 

Other
National Council of Investigation and Security Services

Pacific Northwest Association of Investigators