Best Private
Investigators in

Why These Private Investigators?

Our goal is to connect people with the best local experts. We scored private investigators on more than 25 variables across five categories, and analysed the results to give you a hand-picked list of the best private investigators in Portland, OR.

ReviewedCuratedTop Picks1509718

Our Selection Criteria:

  • 1. Reputation

    A history of delighted customers and outstanding service.

  • 2. Credibility

    Building customer confidence with licensing, accreditations, and awards.

  • 3. Experience

    Masters of their craft, based on years of practical experience and education.

  • 4. Availability

    Consistently approachable and responsive, so customers never feel ignored.

  • 5. Professionalism

    Providing service with honesty, reliability, and respect.

221B Investigations

221B Investigations is a Portland business that serves corporations, insurance carriers, individuals, the entertainment industry, law firms, and third-party administrators. The business’ services include SIU and support, surveillance, background checks, evidence-based statement analysis, and the social media analysis report tool. Owner Reed McClintock is the Lead Investigative Analyst, has an undergraduate degree in Criminal Justice, and he completed his post-graduate work in Psychology. 221B Investigations is licensed, bonded, and insured. Clients appreciate their professionalism, attention to detail, and service.

Portland, OR(503) 997-2273


Brown & Hall Investigations

Brown & Hall Investigations is a Portland business that has more than 30 years of experience in investigating. The business’ services include civil and criminal investigations, locate investigations, background checks, process service, marital indiscretions, missing persons, asset recovery, undercover investigations, accident investigations, and heir finding. Brown & Hall Investigations offers a free consultation and is licensed, bonded, and insured. Ron Brown is a retired United States Secret Service Agent and served five years in the United States Marine Corps. Shannon Hall has a law degree and was a Deputy District Attorney for the State of Oregon and a federal agent with the United States Postal Inspection Service.

Portland, OR(503) 816-8442


Carlson Investigations

Carlson Investigations is a Stafford business led by David Carlson who is a former county and state law enforcement officer and has more than 25 years of investigative experience. David is an expert in law enforcement and law enforcement tactics as well as a certified gang and criminal cases expert, including crime scenes. The business works with corporations, government agencies, businesses, individuals, banks, lawyers, and insurance companies. Carlson Investigations provides services for criminal cases, missing persons, surveillance, background investigations, and civil matters. Carlson Investigations is licensed, bonded, and insured. Clients remark on David’s work ethic, skill, and thoroughness.

Stafford, OR(503) 347-1701


Diligent Investigations, LLC

Diligent Investigations, LLC is a Portland business that has been serving clients for over three years. Owner Robert Grady is a licensed private investigator. The business’ services include process serving, surveillance, court records searches, background checks, missing persons and locates, and legal investigations. Diligent Investigations, LLC is bonded and insured and offers free consultations.

Portland, OR(503) 985-6659


Expert Investigations, Inc.

Expert Investigations, Inc. is a Beaverton business that serves the Pacific Northwest. Services include litigation support, asset investigations, background investigations, human resources investigations, corporate and business investigations, risk management, insurance fraud, skip tracing, witness locates, and interviews and statements. Myron B. Sanders graduated from the National FBI Academy in Quantico, Virginia, and he has over nine years of law enforcement experience.

Beaverton, OR(503) 530-8562


Free Lance Investigations, LLC

Free Lance Investigations, LLC is a Portland business that provides process serving and investigative services. The business’ services include surveillance, corporate and business fraud, general investigation, asset research, skip tracing, trial preparation, court record retrieval, and civil litigation. Free Lance Investigations, LLC also offers a Turnip Report. Barbara Baughman has more than 35 years of experience as a billable law firm investigative paralegal, and she and Rodger Baughman have over 13 years of PI experience. Rodger also has police experience. Free Lance Investigations, LLC is a member of the National Association of Process Servers. Clients appreciate their fair prices, responsiveness, reliability, and knowledge.

Hillsboro, OR(503) 547-8444


Girl Friday Investigations

Girl Friday Investigations is a Portland business that serves individuals, insurance companies, law firms, and corporate legal departments. The business’ services include surveillance, background checks, missing person locations, bug sweeps, mystery shopper, cheating spouse, electronic surveillance, financial forensic fraud, skip trace process service, and insurance judgment recovery. Girl Friday Investigations is a member of the Oregon Association of Licensed Investigators and offers a free consultation. Clients appreciate their prices, responsiveness, efficiency, and reliability.

Portland, OR(503) 702-5520


Guardian Investigations LLC

With over 15 years of law enforcement officer experience, Laura Andersen, the founder of Guardian Investigations LLC serves the Portland and Vancouver, WA areas with comprehensive and expert private investigation services. Andersen is a Licensed Private Investigator (WA PI Agency #2183) with specialty experience in a variety of investigative areas. Guardian Investigations LLC offers private and domestic investigation and surveillance; commercial and corporate screenings, interviews, and support; and missing persons investigations.

Vancouver, WA(503) 912-4109


Gunderson Services

Gunderson Services is a Portland business that serves attorneys, small and large businesses, and individuals. The business has offices in Oregon and Washington, and provides services including injury claims, domestic issues, surveillance, background profiles, fraud claims, asset searches, insurance claims, liability case assistance, employment profiles, and threat management. Gunderson Services tailors services to clients’ needs and also serves federal government agencies, local and national banks, and clients around the world.

Portland, OR(503) 490-8959


Higgins & Associates Investigative Services

Higgins & Associates Investigative Services is a Clackamas business that has been serving the state of Washington and the state of Oregon for over 41 years. Licensed Private Investigator Patrick Higgins specializes in asset and background investigation, surveillance, personal injury, locating witnesses and missing persons, wrongful death, and murder. Patrick is the president of the Oregon Association of Licensed Investigators.

Clackamas, OR(503) 519-4200


Internal Affairs Inc.

Internal Affairs Inc. is a Clackamas business that has been serving clients for over 31 years. The business has experience in a variety of areas including personal injury, insurance work, missing persons, personal security, restraining orders, contested wills, business related issues, and criminal issues. Internal Affairs Inc. has an A+ rating from the Better Business Bureau.

Clackamas, OR(503) 256-4933


Keith A. Weeks

Keith A. Weeks is a West Linn business that has been serving individuals, corporations, and law firms for over 21 years. The business’ services include missing persons, surveillance, environmental, domestic relations, backgrounds, research, computer information, and wrongful death. Clients appreciate his reliability and efficiency.

West Linn, OR(503) 305-7116


Nelson Confidential Investigations, LLC

Nelson Confidential Investigations, LLC is a Portland business that has been serving Oregon and the Greater Portland Area for over two years. The business offers services including investigation and tails, witness location, asset searches, skip traces, witness interviews, employee background checks, and witness statements. The business provides free consultations and flexible pricing. Nelson Confidential Investigations, LLC is licensed and insured and has an A+ rating from the Better Business Bureau.

Portland, OR(503) 575-5015


Northwest Investigations & Consulting LLC

Northwest Investigations & Consulting LLC is a Portland business that has been serving clients for over 26 years. Services include professional surveillance, corporate and legal investigations, background checks, missing person location, domestic matters, fraud investigations, commercial and general liability, and construction defect. Northwest Investigations & Consulting LLC offers a free consultation and is on call 24 hours a day. The business is a member of many organizations including the Association of Licensed Investigators, the Oregon Casualty Adjusters Association, and the Forensic Accident Reconstructionists of Oregon.

Portland, OR(503) 710-4414


Northwest Spanish Investigations

Northwest Spanish Investigations is a Portland business that has been serving Oregon and Washington in English and Spanish for over five years. The business specializes in criminal and civil defense investigations and serves law firms and defense attorneys. Areas of investigation include homicides, post-conviction relief, death penalty, and felonies. Victor Montano is a bilingual private investigator and has more than 25 years of experience.

Portland, OR(503) 860-6127



PDX PI, LLC is a Portland business that provides local and nationwide investigation services. Tom Turner is licensed in California and Oregon and has more than 30 years of investigative experience. Services include private investigation, corporate investigations, social media investigations, asset investigations, family and domestic investigations, background investigations, and locate investigations. PDX PI, LLC is a member of the United States Association of Professional Investigators and offers free phone consultations. Clients remark on Tom’s responsiveness, thoroughness, and professionalism.

Portland, OR(503) 575-2836


PI Services, LLC

PI Services, LLC is a Beaverton business that has been serving Oregon for more than 18 years. Services include private investigation, information retrieval, GPS tracking, small claims, background checks, process serving, and writs of garnishments. PI Services, LLC serves the general public, insurance companies, corporations, process servers, collection departments, nanny companies, attorneys, and private investigators, and provides a free consultation. The private investigators are state licensed and experience. Clients appreciate their knowledge, responsiveness, and professionalism.

Beaverton, OR(503) 643-4274


Snelling Investigators

Snelling Investigators is a Portland business that has two offices and over 35 years of experience. The business’ services include infidelity investigation, assets investigation, personal background checks, internet investigation, surveillance and undercover, witness location, business background investigation, accident investigation, and corporate liability defense. Snelling Investigators serves the Pacific Northwest, Washington, Oregon, and national and international clients. Clients remark on their expertise, knowledge, and thoroughness.

Portland, OR(503) 646-5101


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