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Private Investigators in Seattle, WA

We bring closure and peace of mind

Investigation Services You Can Trust

McDonald & Associates is a professional organization that provides cost-effective investigative services to clients who are combating fraudulent and exaggerated claims. We have served the Greater Seattle area for decades and we pride ourselves on being the largest private investigative firm in the Northwest. 

Each metropolitan area has complications that make private investigations a challenge and Seattle is no different. Seattle has been a center for rapid growth over the past several years, creating larger crowds and more construction. Our private investigators know these challenges and have the experience necessary to navigate them.

Common Seattle Private Investigations

Marital Issues

Marital issues are always sensitive matters. Infidelity, illegal drug use and other immoral behaviors might play a role in the disintegration of a marriage. If your spouse is participating in these behaviors, a private investigator can provide evidence that can be used in court or for other necessary actions.

Child Custody/Support

Our private investigations can help you determine if abuse is taking place while your child is in the care of another parent or caretaker. These custodial investigations can also ensure that the terms and conditions of your arrangements are being followed.


With McDonald & Associates, you can have a private investigator perform background checks on caretakers and conduct surveillance to make sure that your children, seniors or pets are being properly cared for. 


If you fear that you are being stalked by an ex-spouse, co-worker, ex-lover or anyone else, our private investigators in Seattle can confirm and provide evidence to share with the authorities.

Get the help you need today from our Seattle private investigators.
Free Consultation!

Have a question about our services in Seattle?
To learn how our Seattle private investigators can help you, or to discuss opening a case, call (206) 309-8737 or toll-free (888) 539-1535.
You can also inquire by filling out our Contact Page form.

Private Investigation Firm with 25 years Experience


Areas We Serve

Below are just a few of the neighborhoods we serve in the Seattle, WA area:


Services We Offer

Seattle Private Investigators Blog

Learn more about how our private investigators can help you!

An Investigation Can Help Protect Your Family

An Investigation Can Help Protect Your Family

Children are some of the most vulnerable people in society. As parents, friends or relatives, you might notice certain signs of abuse. If you suspect that a loved one (either a child or a senior) is being mistreated by a caretaker, start an investigation to verify...

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Hire a Private Investigator for a Criminal Investigation

Hire a Private Investigator for a Criminal Investigation

If a crime has been committed, evidence will be necessary to find the scope of the damage and what charges will be made in the prosecution. Our private investigators use several techniques to track and collect evidence. They know what types of evidence will be used in...

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Private Investigators You Can Trust

Private Investigators You Can Trust

McDonald & Associates is the largest private investigative firm in the Northwest, with operations in several cities, including Seattle. We specialize in providing affordable investigative services to businesses and individuals who are dealing with difficult...

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I use McDonald & Associates to investigate fraudulent insurance claims. They do a very good job and have been around forever. If you want investigators with a proven track record and lots of experience, these are the guys.
- Ben Gagne