Delia Investigations

 Accurate and Dependable

Delia Investigations is based in Grays Harbor County, Washington and serves legal attorneys and private individuals. The foundation of Delia Investigations is based on integrity, justice, and an unfailing commitment to quality and attention to detail. We believe that each of our clients deserves the highest regard to their welfare and do so by thoroughly investigating the TRUTH in each case.

Private Investigator John Delia

Experience you can count on.

We are committed to providing exceptional service and attention to detail exceeding each client's expectations, while upholding the highest level of professionalism, confidentiality and integrity.

Investigative Services

Delia Investigations provides investigative and research services in Washington, Oregon, and Idaho. with the ability to investigate all over the world .


Investigative Portfolio

John Delia is recognized as a leader in the field of investigation, serving 29 years as a law enforcement officer and 20 years as a private investigator. 


Accurate & Reliable

Years of experience has taught us to work with clients to develop the most effective investigative solution possible. Our goal in every investigation is to gather information and evidence that is accurate and reliable.

Working for you and with you

Our Protocol is to consult with each client prior to beginning any investigation in order to identify the proper approach. We like our clients to know what we are doing, when we are doing it and the estimated cost of the investigations.


"John Delia’s knowledge of the criminal legal system in Grays Harbor County is incredible. As a lawyer from outside of the county, I found his assistance crucial. He was easy to work with and reliable. His work was hugely helpful, and my client’s case eventually got dismissed.""

Joshua R. Saunders, Attorney
The Marshall Defense Firm, P.S., Seattle WA

"I have worked with John over the past 20 years on numerous criminal and civil cases with successful outcomes. He is well respected within the judicial system in Grays Harbor and Pacific counties."

Wayne D. Hagen, Jr.
Hagen & Bates P.S., Aberdeen WA

“He brings a level of honesty, integrity and professionalism to the judicial systems.”

Erik M. Kupka of Ingram
Zelasko & Godwin, LLP, Aberdeen WA

For a free consultation, send us an email by filling out the form below or give us a call at 360-580-3631.