Investigation Services Directory

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A private investigation service provides confidential activity checks of specified individuals and confidential surveillance of specified individuals. This Investigation Services directory includes investigation service provider pages for every State in the USA plus Washington, DC. Each State and District page lists investigation services and private investigators located in that State or District, including their company or website names as well as their locations, phone numbers, and website links.

vintage investigator smoking a pipe and holding a magnifying glass

Before visiting an investigation service provider listed herein, be sure to check its address, hours of operation, and appointment policy (if any) by visiting its website or contacting it. The investigation service provider may have moved or no longer be in business, and hours of operation may be irregular.

Each directory listing specifies the County in which the investigation service provider is located as well as the database categories that are relevant to the listing. Convenient links to adjacent State directories are provided at the bottom of each directory page.


Alabama Alaska Arkansas Arizona California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana	Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming Washington, DC

States with no investigation service provider listings are grayed out in the State Menu.

The 10 states with the most investigation service provider listings are shown below, along with the number of listings in each of these states.

California (≈127)
Florida (≈69)
Texas (≈62)
New York (≈56)
Illinois (≈46)
North Carolina (≈39)
Ohio (≈27)
New Jersey (≈25)
Pennsylvania (≈24)
Massachusetts (≈24)

The 10 cities with the most investigation service provider listings are shown below, along with the number of listings in each of these cities.

Houston, Texas (≈18)
New York, New York (≈17)
Chicago, Illinois (≈13)
Miami, Florida (≈10)
Cincinnati, Ohio (≈8)
Seattle, Washington (≈8)
Phoenix, Arizona (≈7)
Los Angeles, California (≈7)
San Jose, California (≈7)
Las Vegas, Nevada (≈6)

Nationwide Investigation Services

The following enterprises have offices or other operations in multiple locations; most of them have operations in multiple states. Many of these large investigation services and private investigators list their primary office locations on their websites.


Federal Bureau-Investigation www.fbi.gov Located in about 31 states.	Federal Government Offices Government Offices Investigation Services Security Systems and Services

Safety-Kleen Systems www.safety-kleen.com Located in about 40 states.	Solvents Security Consultants and Agencies Chemicals Dealers Chemicals Wholesale and Manufacturers Investigation Services Recycling Services, Equipment and Supplies Security Systems and Services Energy and Environment

Securitas Security Service USA Inc securitasinc.com	Security Systems and Services Investigation Services Security Consultants and Agencies

Related Category Page(s)

Surveillance Equipment & Services	Samaritans Purse Sponsored Link	Security Consultants & Agencies

Related Website

Surveillance Equipment - illustrated guide to surveillance equipment.
www.surveillanceequipment.us

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