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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!

A Seattle Detective Can Help Prevent Stalkers

A Seattle Detective Can Help Prevent Stalkers

Do you think you might have a stalker? Do you suspect that someone is following you around? Does it feel like your privacy is being violated, but you don’t have the proof you need to be sure? If you’re worried, you have a right to be. Stalking is common among...

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Private Investigators in Washington State

Private Investigators in Washington State

Do you have a nagging feeling regarding strange behavior from your significant other or business partner? Do you suspect that they may be up to something nefarious, but you can’t quite put your finger on what that might be? Would you like to find out for sure and...

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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