Private Investigators Long Island


A Private Investigator based on Long Island, serving Nassau County, Suffolk County and New York City.

Long Island Investigations, Inc.                        Experience, Diligence, Results



Services at a glance:

  • Surveillance
  • Security
  • Matrimonial
  • Background Checks
  • Criminal Records
  • Infidelity
  • Child Custody 
  • Lawsuits
  • Assets Located
  • Cheating Spouse

Check our Services Page

Private Investigator Long Island, New York 516-458-1999

private investigator long islandA Long Island Based Private Investigator Serving Nassau County, Suffolk County, and New York City. We are conveniently located in Massapequa. If you prefer, we will even come to you.


Serving Nassau County

private investigator long island new yorkAll cases at Long Island Investigations are performed by the most professional and experienced staff of private investigators in the industry. Our investigative and security personnel consists of former New York City Police Department Detectives and are private investigators with unmatched experience in all areas of private investigations.


Serving Suffolk County

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We are a fully licensed, by the state of New York, bonded and insured Suffolk County private investigators and Nassau County private investigator agency. We are based in Massapequa Park, Long Island. We specialize in many areas of Private Investigation. See our services page for more details.


Among other types of cases, we specialize in cases pertaining to divorce, infidelity, child custody, insurance fraud, background checks, locating hidden assets, cheating spouse, and many investigative issues.


Service Area

Long Island Investigations is a Nassau County and Suffolk County Private Investigator as well as offering our services in New York City. We are based in Massapequa Park within Nassau County, though we provide our investigative services throughout the state.



This agency is dedicated to helping you with any situation. Each case can be customized to your individual needs and budget. Visit our Investigative Services link to view a brief outline of the services we offer, or click on our About Us section to read about our experience and the qualifications of our investigators.


Licensed Bonded Insured

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Help is just a phone call away! 516-458-1999