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Maine · 125 communities

Private Investigators in Maine by City

Choose your community to see which courts hear local cases, how Maine licenses investigators and how to request a match with a vetted, licensed investigator within our network who works that county.

Request a Private Investigator (629) 310-8667

Licensing

How Maine Licenses Private Investigators

Maine licenses investigators under Title 32, Chapter 89 of the Maine Revised Statutes, which covers professional investigators. The Maine State Police Special Investigations Unit handles the licenses. The law defines a professional investigator as a person who engages in or solicits business, or accepts employment, to conduct private investigations, and it also recognizes licensed investigative assistants who work under a licensed investigator's supervision.

In Maine the license follows the person. A client should confirm that the investigator is listed as a licensed professional investigator and, if an assistant will do some of the work, that the assistant is licensed and supervised. The State Police post a Licensed Professional Investigators list on the program page, which makes a first check quick.

Courts

How Maine Courts Are Organized

Maine's state courts are run by the Judicial Branch. The Superior Court sits in each of the 16 counties and hears more serious civil cases and jury trials. The District Court sits in towns across the state and handles divorce, custody and other family matters, small claims, evictions and protection orders. Criminal cases move through a Unified Criminal Docket shared by both courts. Probate matters go to a separate Probate Court in each county, led by an elected judge.

Communities

Maine Communities With a Private Investigator Page

Every Maine community over 3,000 residents, by population (U.S. Census Bureau, April 1, 2020 estimates base and July 1, 2024 estimates (Vintage 2024)).

CommunityCountyPopulation (2024 est.)
PortlandCumberland County69,568
LewistonAndroscoggin County38,772
BangorPenobscot County32,446
South PortlandCumberland County26,994
AuburnAndroscoggin County25,200
ScarboroughCumberland County24,010
BrunswickCumberland County22,631
SanfordYork County22,497
BiddefordYork County22,370
WestbrookCumberland County21,386
SacoYork County21,064
WindhamCumberland County19,690
AugustaKennebec County19,168
GorhamCumberland County18,545
WatervilleKennebec County17,336
YorkYork County14,179
FalmouthCumberland County12,919
OronoPenobscot County12,199
KennebunkYork County12,028
WellsYork County11,940
KitteryYork County11,064
StandishCumberland County10,897
TopshamSagadahoc County9,820
LisbonAndroscoggin County9,814
Cape ElizabethCumberland County9,688
BrewerPenobscot County9,629
Old Orchard BeachYork County9,438
YarmouthCumberland County9,060
FreeportCumberland County8,877
CumberlandCumberland County8,832
EllsworthHancock County8,822
BathSagadahoc County8,817
Presque IsleAroostook County8,728
SkowheganSomerset County8,664
BuxtonYork County8,591
GrayCumberland County8,583
BerwickYork County8,332
FarmingtonFranklin County8,320
WaterboroYork County8,124
WinslowKennebec County8,072
HampdenPenobscot County8,022
South BerwickYork County7,824
OldPenobscot County7,511
EliotYork County7,447
CaribouAroostook County7,328
RocklandKnox County7,060
BelfastWaldo County6,993
HermonPenobscot County6,921
LebanonYork County6,732
FairfieldSomerset County6,530
OaklandKennebec County6,351
WinthropKennebec County6,187
GardinerKennebec County6,160
TurnerAndroscoggin County6,013
PolandAndroscoggin County6,010
HoultonAroostook County6,005
RumfordOxford County5,967
BridgtonCumberland County5,896
New GloucesterCumberland County5,861
ParisOxford County5,379
Bar HarborHancock County5,326
NorwayOxford County5,326
WaldoboroLincoln County5,296
North BerwickYork County5,257
SabattusAndroscoggin County5,213
CamdenKnox County5,189
HarpswellCumberland County5,074
WarrenKnox County5,060
BucksportHancock County5,039
HollisYork County4,954
LincolnPenobscot County4,945
SidneyKennebec County4,904
MadisonSomerset County4,839
GlenburnPenobscot County4,785
JayFranklin County4,674
RaymondCumberland County4,662
LymanYork County4,655
VassalboroKennebec County4,653
ChinaKennebec County4,599
Dover-FoxcroftPiscataquis County4,500
ArundelYork County4,496
GreeneAndroscoggin County4,492
OxfordOxford County4,399
North YarmouthCumberland County4,362
DurhamAndroscoggin County4,355
MonmouthKennebec County4,236
Fort KentAroostook County4,159
LimingtonYork County4,126
MillinocketPenobscot County4,116
NaplesCumberland County4,062
WiscassetLincoln County3,951
PittsfieldSomerset County3,944
OrringtonPenobscot County3,895
WiltonFranklin County3,889
WinterportWaldo County3,865
DexterPenobscot County3,849
MadawaskaAroostook County3,844
LitchfieldKennebec County3,750
CascoCumberland County3,741
KennebunkportYork County3,708
West GardinerKennebec County3,700
RockportKnox County3,653
RichmondSagadahoc County3,573
FryeburgOxford County3,563
LimerickYork County3,548
BelgradeKennebec County3,513
HoldenPenobscot County3,412
ClintonKennebec County3,387
PittstonKennebec County3,305
NorridgewockSomerset County3,299
Fort FairfieldAroostook County3,293
WoolwichSagadahoc County3,226
BowdoinSagadahoc County3,209
LevantPenobscot County3,203
Mechanic FallsAndroscoggin County3,196
BowdoinhamSagadahoc County3,190
Livermore FallsAndroscoggin County3,173
AlfredYork County3,163
NewportPenobscot County3,159
BoothbayLincoln County3,153
MilfordPenobscot County3,108
CalaisWashington County3,105
CorinthPenobscot County3,082
FarmingdaleKennebec County3,029
ShapleighYork County3,010

Read the full Maine investigator guide

Neighboring states: New Hampshire

How this service works

Investigator Consulting in Maine

Delator Group is a private investigation firm licensed in Tennessee and headquartered in Nashville. In Maine, Delator Group is not licensed as a private investigator or private investigative agency and does not perform, supervise or direct investigations. We review requests and refer them to independent investigators who hold the license Maine requires. Those investigators contract with clients directly, set their own fees and are responsible for the work. Delator Group may receive compensation from participating investigators for referrals.

FAQ

Questions About Finding an Investigator in Maine

Which Maine communities have their own page?

Every incorporated Maine city, town or village with more than 3,000 residents, plus every township or town government of that size, has its own page here, 125 in all. Smaller places are covered by the nearest page and the statewide guide.

Is Delator Group licensed in Maine?

No. In Maine, Delator Group provides investigator consulting and referral only. Investigations are performed by independently licensed Maine investigators who contract with you directly.

Who licenses private investigators in Maine?

The Maine State Police, Special Investigations Unit, under 32 M.R.S. Chapter 89, Professional Investigators. Anyone who engages in, solicits or accepts work conducting private investigations must hold a professional investigator license unless an exception applies, and investigative assistants work under a licensed investigator's supervision.

How do I check an investigator's Maine license?

Check the Licensed Professional Investigators list on the Maine State Police professional investigator page, and call the licensing unit if a name is missing.

Is Maine a one-party or two-party consent state?

Maine is generally a one-party consent state. Under 15 M.R.S. Sections 709 and 710, the sender or receiver of a communication, or someone given prior authority by one of them, is not intercepting it. Recording a conversation you are not part of without that authority is a crime, so an attorney should confirm your situation.