Directory of Private Investigators and Investigation Agencies

How to hire a private investigator
Learn how to hire a private investigator anywhere in the world.

Welcome to the Private Investigator Directory, one of the largest international directories of investigative professionals. This page explains how to hire a private investigator, agency or firm anywhere in the United States and around the world.

If you need to hire a professional private investigator with deep investigation experience, or a process server, our directory can help connect you with experts in your area. Just select your state or country from the list below to browse a list of professional agencies in your local area.

For help with selecting the appropriate agency, firm or individual for your specific needs or personal situation, see our List of Tips for hiring a Private Investigator. Also, learn more about the Cost to Hire a Private Investigator.

Why Hire a Private Investigator?

There are a number of reasons to hire a qualified investigator to assist you with your investigation needs. Whether you need to run a background check, conduct surveillance on a cheating spouse, track down a missing person, or just dig up facts and information, a private detective can save you the time, money and hassle of trying to do it yourself.

Professional gumshoes have a wide variety of skills and experience that are conducive to uncovering hidden information and getting answers to difficult questions.

Many private investigators are retired military, former police officers or law enforcement officials, or have experience with other law enforcement or intelligence agencies. Given the wide variety of potential services that could be offered, many P.I.’s often specialize in a few specific areas, such as following a cheating partner, investigating insurance fraud, acting as a process server, or searching for hidden assets.

Larger agencies employ numerous investigative specialists and are capable of providing a wider variety of services. To view a list of private eyes in each state, select the appropriate state below:

Private Investigators (United States)

Now that you understand how to hire a private investigator, use this list of states to start your search for a professional in your local area. Browse the listings and make a short list of experts to contact.

How to Hire a Private Investigator Outside the United States

Following is a list of private investigators and investigation agencies and firms that are available for hire outside of the United States. Before hiring an individual or company check with the appropriate licensing agency within the country to verify licensing credentials.



South America

Other Areas

Help Keep our Directory up to Date

Existing licensed private investigators: We need your help policing our directory. Our directory includes thousands of investigators from locations around the world. We do our best to keep our directory up to date by regularly checking links, modifying listings based on owner requests, and removing unlicensed or fraudulent listings.

There are a lot of people out there who want to know how to hire a private investigator, and our directory can help. But it has to contain accurate information. If you are aware of an investigation agency or individual investigator who is not licensed, please let us know.

If you have any questions about how to hire a private investigator, please post a message below.

Join the Private Investigator Directory

Permanent listings in our new directory are available starting at just $4.95 a month. New listings also include an announcement on our Twitter, Facebook, LinkedIn and Google pages. Add your listing and promote your firm’s services and affiliations. Your business will benefit from increased exposure and website traffic from people who need to hire a P.I.

Join the NEW Directory Today

Listing Your Private Investigation Agency in Private Eye Directories

As with any business, private investigators need to market and advertise their business to attract potential clients. Private investigators have a variety of marketing options to choose from – online, print, radio, TV, and more.  A wise businessperson rarely ever puts all of their marketing dollars in one basket.  It is usually a good idea to experiment with a variety of marketing and advertising options to see what works best for your type of business.

Online Marketing and Advertising for Your Detective Agency

Due to its comparatively low cost and potential to reach a large audience, online advertising has become a standard component in most marketing plans.

One great way to promote your private investigation agency, your private investigator services, and your P.I. website is to get listed in online private investigator directories.  Online investigation directories provide a quick and easy way to expose your business to hundreds or even thousands of potential clients.

One challenge with online private investigation directories is there are a number of different directories to choose from. If it’s in your budget, we recommend registering with multiple directories to increase your exposure. Potential clients often turn to the web as a first step to learn about your business. Even if they receive a referral from a reliable source, they are likely to check you out on the web before contacting you.  

If a potential client conducts a Google search and your company information turns up in multiple legitimate directories, it may increase the legitimacy of your business in the client’s mind.

Value of Listing Your Firm in a P.I. Directory

When evaluating the various directories, consider the popularity of the website as a whole. The more popular the website, the more value the link to your website will be. Most search engines count links to your website as a “vote” when determining search engine rankings.

But it is not just the number of votes that count.  It is the quality of those votes that will help your website rise higher in search engine rankings. Registering with quality directories will ensure quality, beneficial links to your website. That, in turn, will drive potential clients right to your front door.

Questions and Comments

If you have any questions or comments about how to hire a private investigator, please let us know.

Michael Kissiah is the owner of Brandy Lane Publishing, LLC, which owns and operates a small portfolio of websites, including Michael created more than 20 years ago after working as a private investigator in the state of Florida. Since that time, he has become an expert at how to find information online and has written over 1000 articles on topics related to the investigation industry. In addition, he is the author of the "Private Investigator Licensing Handbook", available at


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