Illinois Encrypted Agencies

77 Police Departments

24 Sheriff Offices

12 Fire Departments

4 EMS Agencies

Fully Encrypted 79 agencies (60%)

Partially Encrypted 52 agencies (40%)

RadioReference Verification

✓

95 Verified Agencies

73%

8 Discovered via RadioReference

📡

379 Documented Talkgroups

127 encrypted 19 mixed Browse →

Agency Name	County	Type	Encryption	Scope
Algonquin-Lake in the Hills Fire Protection District ✓	McHenry	Fire	P25 AES-256	Tactical Only
AMT Ambulance	La Salle, Peoria, Sangamon,	Ems	P25 AES-256	Partially Encrypted
Antioch Police ✓	Lake	Police	P25 AES-256	Tactical Only
Art Institute of Chicago	Cook	Other	DMR Enhanced Privacy	Fully Encrypted
Bannockburn Police ✓	Lake	Police	P25 AES-256	Fully Encrypted
Batavia/Elburn/Geneva/St. Charles Police ✓	Kane	Police	P25 AES-256	Fully Encrypted
Barrington Police ✓	Lake	Police	P25 AES-256	Tactical Only
Beardstown Police ✓	Cass	Police	NXDN	Fully Encrypted
Bellville Police	St. Clair	Police	P25 AES-256	Fully Encrypted
Bethalto Fire	Madison	Fire	P25 AES-256	Specific Channels
Bloomington Police ✓	McLean	Police	P25 AES-256	Fully Encrypted
Bloomington Public Works ✓	McLean	Other	P25 AES-256	Fully Encrypted
Bolingbrook Police	Will	Police	P25 ADP	Partially Encrypted
Boone County Sheriff's Office ✓	Boone	Sheriff	P25 AES-256	Fully Encrypted
Cass County EMS ✓	Cass	Ems	NXDN Scrambling	Fully Encrypted
Cass County Fire ✓	Cass	Fire	NXDN Scrambling	Fully Encrypted
Chicago Police Department ✓	Cook	Police	P25 AES	Fully Encrypted
Christian County Sheriff ✓	Christian	Sheriff	P25 AES-256	Fully Encrypted
Cicero Police ✓	Cook	Police	NXDN Scrambling	Fully Encrypted
City of Joliet Fire Department ✓	Will	Fire	P25 ADP	Fully Encrypted
City of Joliet Police Department ✓	Will	Police	P25 ADP	Fully Encrypted
City of Joliet Public Works ✓	Will	Other	P25 ADP	Fully Encrypted
Clark County Sheriff's Office	Clark	Sheriff	P25 AES-256	Tactical Only
Coal City Police ✓	Grundy	Police	P25 AES-256	Specific Channels
Cook County Sheriff/StarCom21 Node 5 ✓	Cook	Sheriff	P25 AES-256	Fully Encrypted
Crete Police ✓	Will	Police	P25 ADP	Fully Encrypted
Crystal Lake Fire Protection District	McHenry	Fire	P25 AES-256	Tactical Only
Danville Police ✓	Vermilion	Police	DMR Enhanced Privacy	Fully Encrypted
Decatur Police ✓	Macon	Police	P25 AES-256	Fully Encrypted
Deerfield Police ✓	Lake	Police	P25 AES-256	Fully Encrypted
DuPage County Police ✓	DuPage	Police	P25 AES-256	Tactical Only
DuPage County Sheriff's Office ✓	DuPage	Sheriff	P25 AES-256	Partially Encrypted
East Shore Law Enforcement ✓	Lake	Other	P25 AES-256	Fully Encrypted
Edwardsville Fire/EMS ✓	Madison	Fire	P25 AES-256	Specific Channels
Elgin Police ✓	Kane	Police	P25 AES-256	Fully Encrypted
Glenview Police ✓	Cook	Police	P25 AES-256	Fully Encrypted
Godfrey Fire	Madison	Fire	P25 AES-256	Specific Channels
Grayslake ✓	Lake	Other	P25 AES-256	Fully Encrypted
Granite City Police	Madison	Police	P25 AES-256	Specific Channels
Greene County Law ✓	Greene	Sheriff	NXDN	Fully Encrypted
Grundy County Sheriff ✓	Grundy	Sheriff	P25 AES-256	Tactical Only
Gurnee Police ✓	Lake	Police	P25 AES-256	Tactical Only
Fox Lake Police/Foxcomm ✓	Lake	Police	P25 AES-256	Fully Encrypted
Freeport Police	Stephenson	Police	P25 AES-256	Specific Channels
Hatzolah EMS ✓	Cook	Ems	MOTOTRBO	Fully Encrypted
Harwood Heights/Norridge/Schiller Park Police ✓	Cook	Police	P25 AES-256	Fully Encrypted
Hawthorn Woods Police ✓	Lake	Police	P25 AES-256	Tactical Only
Highland Police	Madison	Police	P25 AES-256	Partially Encrypted
Highland Park Police ✓	Lake	Police	P25 AES-256	Fully Encrypted
Highwood Police ✓	Lake	Police	P25 AES-256	Fully Encrypted
Huntley Fire Protection District	McHenry	Fire	P25 AES-256	Tactical Only
Illinois Attorney General	Statewide	Other	P25 AES-256	Specific Channels
Illinois Department of Corrections	Statewide	Corrections	P25 ADP	Partially Encrypted
Illinois Department of Public Health	Stateside	State	P25 AES-256	Partially Encrypted
Illinois National Guard	Statewide	Military	P25 AES-256	Specific Channels
Illinois State Police	Statewide	Police	P25 AES-256	Tactical Only
Illinois State University Police ✓	McLean	Police	P25 AES-256	Fully Encrypted
Illinois Terrorism Task Force	Statwide	Other	P25 AES-256	Fully Encrypted
Illinois Toll Authority	Multiple	Other	P25 DES-OFB	Partially Encrypted
Island Lake Police ✓	Lake	Police	P25 AES-256	Tactical Only
Jacksonville Police	Morgan	Police	NXDN	Partially Encrypted
Kanakakee Hospitals ✓	Kanakakee	Hospital	P25 AES-256	Fully Encrypted
Kanakakee Police ✓	Kanakakee	Police	P25 AES-256	Tactical Only
La Grange/La Grange Park/Western Springs Police ✓	Cook	Police	P25 AES-256	Fully Encrypted
Lake Bluff Police ✓	Lake	Police	P25 AES-256	Fully Encrypted
Lake County Fire	Lake	Fire	P25 AES-256	Fully Encrypted
Lake County Sheriff ✓	Lake	Sheriff	P25 AES-256	Partially Encrypted
Lake Forest Police ✓	Lake	Police	P25 AES-256	Tactical Only
Lake Zurich Police ✓	Lake	Police	P25 AES-256	Tactical Only
Libertyville Police ✓	Lake	Police	P25 AES-256	Tactical Only
Lincolnshire Police ✓	Lake	Police	P25 AES-256	Tactical Only
Lindenhurst Police ✓	Lake	Police	P25 AES-256	Tactical Only
Logan County Sheriff ✓	Logan	Sheriff	P25 AES	Fully Encrypted
MABAS	Statewide	Other	P25 AES-256	Partially Encrypted
Macon County Sheriff ✓	Macon	Sheriff	P25 AES-256	Fully Encrypted
McHenry County Sheriff	McHenry	Sheriff	P25 AES-256	Tactical Only
McHenry Government ✓	McHenry	Other	P25 AES-256	Fully Encrypted
McHenry Fire/EMS ✓	McHenry	Fire	P25 AES-256	Fully Encrypted
McHenry County - North East Regional Communications Center ✓	McHenry	Sheriff	P25 AES-256	Fully Encrypted
McHenry County - Southeast Emergency Communications Center ✓	McHenry	Sheriff	Unknown	Tactical Only
McLean County Sheriff ✓	McLean	Sheriff	P25 AES-256	Fully Encrypted
Minooka Police ✓	Grundy	Police	P25 AES-256	Specific Channels
Monroe County Law ✓	Monroe	Sheriff	P25 AES-256	Fully Encrypted
Morgan County Sheriff	Morgan	Sheriff	NXDN	Partially Encrypted
Morris Police ✓	Grundy	Police	P25 AES-256	Specific Channels
Morton Grove Police ✓	Cook	Police	P25 AES-256	Fully Encrypted
Mundelein Police ✓	Lake	Police	P25 AES-256	Tactical Only
Naperville Police ✓	DuPage	Police	P25 AES-256	Specific Channels
Niles Police ✓	Cook	Police	P25 AES-256	Fully Encrypted
Normal Police ✓	McLean	Police	P25 AES-256	Fully Encrypted
Northbrook Police ✓	Cook	Police	P25 AES-256	Fully Encrypted
NWCD Police Dispatch 1-Elk Grove Village/Mt.Prospect/Prospect Heights ✓	Cook	Police	P25 AES-256	Fully Encrypted
NWCD Police Dispatch 2-Inverness/Palatine/Rolling Meadows ✓	Cook	Police	P25 AES-256	Fully Encrypted
NWCD Police Dispatch 3-Arlington Heights/Buffalo Grove ✓	Cook	Police	P25 AES-256	Fully Encrypted
NWCD Police Dispatch 4-Hoffman Estates/Streamwood ✓	Cook	Police	P25 AES-256	Fully Encrypted
NWCD Police Dispatch 5-Schaumburg ✓	Cook	Police	P25 AES-256	Fully Encrypted
Park City Police ✓	Lake	Police	P25 AES-256	Fully Encrypted
Peoria Police ✓	Peoria	Police	P25 AES-256	Fully Encrypted
Riverwood Police ✓	Lake	Police	P25 AES-256	Fully Encrypted
Rockford Police ✓	Winnebago	Police	P25 ADP	Fully Encrypted
Round Lake Beach Police ✓	Lake	Police	P25 AES-256	Fully Encrypted
Round Lake Heights Police ✓	Lake	Police	P25 AES-256	Fully Encrypted
Round Lake Park Police ✓	Lake	Police	P25 AES-256	Fully Encrypted
Sangamon County Sheriff	Sangamon	Sheriff	P25 AES-256	Specific Channels
Schuyler County Sheriff ✓	Schuyler	Sheriff	NXDN	Fully Encrypted
Secretary of State Police	Statewide	Police	P25 AES-256	Specific Channels
Seneca Police ✓	Grundy	Police	P25 AES-256	Fully Encrypted
Shelby County Sheriff ✓	Shelby	Sheriff	P25 AES-256	Fully Encrypted
Skokie Police ✓	Cook	Police	P25 AES-256	Fully Encrypted
South Chicago Heights/Steger Police	Cook and Will	Police	P25 ADP	Fully Encrypted
South Elgin Police ✓	Kane	Police	P25 AES-256	Fully Encrypted
Springfield Police	Sangamon	Police	P25 AES-256	Partially Encrypted
St. Clair County Government ✓	St. Clair	Sheriff	P25 AES-256	Fully Encrypted
St. Clair County Sheriff ✓	St. Clair	Sheriff	P25 AES-256	Fully Encrypted
SUIE Police	Madison	Police	P25 AES-256	Specific Channels
Troy Police ✓	Madison	Police	P25 AES-256	Fully Encrypted
Vermilion County Sheriff ✓	Vermilion	Sheriff	DMR Enhanced Privacy	Fully Encrypted
Vernon Hills Police ✓	Lake	Police	P25 AES-256	Tactical Only
Wauconda Police ✓	Lake	Police	P25 AES-256	Fully Encrypted
Waukegan Fire ✓	Lake	Fire	P25 AES-256	Fully Encrypted
Waukegan Police ✓	Lake	Police	P25 AES-256	Fully Encrypted
Winnebago County Sheriff's Office ✓	Winnebago	Sheriff	P25 ADP	Fully Encrypted
Winnetka, Wilmette, Glencoe, Northfield, Kenilworth Police (Net 24B) ✓	Cook	Police	P25 AES-256	Fully Encrypted
Cook Township Police NEW	Cook	Police	P25 AES-256	Fully Encrypted
Dekalb County Corrections ✓ NEW	Dekalb	Corrections	P25 AES-256	Fully Encrypted
Dekalbci Township Police NEW	Dekalb	Police	P25 AES-256	Partially Encrypted
Stronghurst Police NEW	Henderson	Police	P25 AES-256	Fully Encrypted
Jefferson County Police NEW	Jefferson	Police	P25 AES-256	Fully Encrypted
Galesburg Police Department NEW	Knox	Police	P25 AES	Dispatch Only
Galesburg Fire Department NEW	Knox	Fire	P25 AES	Dispatch Only
Knox County Sheriff's Department NEW	Knox	Sheriff	P25 AES	Dispatch Only

Browse Illinois by County

Search or select a county to see encrypted agencies in that area.

34 counties

Related Case Study

Learn more about police radio encryption issues in Illinois.

Read Illinois Case Study

Frequently Asked Questions

How many public safety agencies in Illinois are encrypted?

131 agencies in Illinois are documented as encrypted: 79 (60%) fully encrypted and 52 with partial encryption. See the full table below for specific agencies.

Which Illinois agencies have verified encryption data?

95 of the 131 agencies listed here (73%) have been checked directly against the RadioReference API, covering 379 documented talkgroups. The rest are sourced from the community-maintained RadioReference Wiki and may be less current.

Which county in Illinois has the most encrypted agencies?

Lake County leads Illinois with 30 encrypted agencies (57% fully encrypted). Browse the county list below to see how your area compares.

Can I still monitor police scanners anywhere in Illinois?

Yes. 52 agencies in Illinois have only partial encryption, and fire/EMS channels frequently stay open even in counties where police departments have gone dark. Use the filters below to find what's still accessible.

Can Illinois residents get an encryption decision reversed?

Yes — encryption is a local policy decision, not a technical requirement, and it can be revisited. Our Illinois case study covers what has and hasn't worked there so far.

Fight Encryption in Illinois

Join the movement to restore transparency to public safety communications.

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