Decoded by Binary Rogue · Frequencies by RadioReference.com

Police Radio Encryption in Illinois

Illinois has an encryption rate of 8%. Out of 2097 tracked public safety agencies, 36 are fully encrypted, 283 are partially encrypted, and 1778 broadcast in the clear.

36
Encrypted
283
Partial
1778
Clear

Agencies by Type

839
Public Safety
76 encrypted
129
Law Enforcement
38 encrypted
128
EMS
18 encrypted
78
Fire
10 encrypted
70
Dispatch
23 encrypted
60
Government
29 encrypted
14
Federal
9 encrypted
1
State Police
1 encrypted
778
Other
115 encrypted

Encrypted & Partially Encrypted Agencies in Illinois

Statewide Encrypted Systems

These agencies operate on statewide radio systems and serve multiple jurisdictions across Illinois.

County Breakdown

102 counties tracked across Illinois. 74 have at least one encrypted or partially encrypted agency.

View all 102 counties
County Agencies Encrypted Partial Clear Rate
Edgar County 3 1 1 1 50%
Massac County 3 1 1 1 50%
Moultrie County 3 0 3 0 50%
Edwards County 1 0 1 0 50%
Itinerant County 1 0 1 0 50%
Pulaski County 1 0 1 0 50%
Jersey County 4 0 2 2 25%
Schuyler County 4 0 2 2 25%
Pope County 2 0 1 1 25%
Adams County 28 1 10 17 21%
De Witt County 5 0 2 3 20%
Pike County 11 2 0 9 18%
Jefferson County 21 0 7 14 17%
Cumberland County 3 0 1 2 17%
Putnam County 3 0 1 2 17%
Morgan County 13 1 2 10 15%
Carroll County 7 0 2 5 14%
Jackson County 7 0 2 5 14%
Franklin County 15 0 4 11 13%
Douglas County 12 0 3 9 13%
Piatt County 4 0 1 3 13%
Marion County 21 1 3 17 12%
Macoupin County 34 0 8 26 12%
Mason County 14 0 3 11 11%
Cook County 219 7 32 180 11%
Vermilion County 29 0 6 23 10%
Champaign County 50 1 8 41 10%
McDonough County 21 0 4 17 10%
Christian County 11 0 2 9 9%
Montgomery County 11 0 2 9 9%
Williamson County 28 1 3 24 9%
Washington County 18 1 1 16 8%
Bureau County 12 0 2 10 8%
Fulton County 25 1 2 22 8%
Peoria County 39 0 6 33 8%
Woodford County 20 0 3 17 8%
Rock Island County 35 0 5 30 7%
Whiteside County 21 0 3 18 7%
Menard County 7 0 1 6 7%
Bond County 16 1 0 15 6%
Sangamon County 65 3 2 60 6%
Winnebago County 44 2 1 41 6%
Ford County 9 0 1 8 6%
Monroe County 9 0 1 8 6%
Kane County 46 0 5 41 5%
Grundy County 19 0 2 17 5%
Warren County 20 0 2 18 5%
Clark County 10 0 1 9 5%
Marshall County 10 0 1 9 5%
DuPage County 102 2 6 94 5%
La Salle County 41 0 4 37 5%
Tazewell County 43 1 2 40 5%
Hancock County 11 0 1 10 5%
McHenry County 34 0 3 31 4%
DeKalb County 23 0 2 21 4%
St. Clair County 58 0 5 53 4%
Macon County 24 1 0 23 4%
Madison County 65 0 5 60 4%
Fayette County 13 0 1 12 4%
Kendall County 13 0 1 12 4%
Effingham County 14 0 1 13 4%
Will County 72 0 5 67 3%
McLean County 44 0 3 41 3%
Lee County 16 0 1 15 3%
Logan County 17 0 1 16 3%
Henry County 18 0 1 17 3%
Ogle County 22 0 1 21 2%
Livingston County 23 0 1 22 2%
Kankakee County 25 0 1 24 2%
Stephenson County 25 0 1 24 2%
Knox County 27 0 1 26 2%
Randolph County 27 0 1 26 2%
Clinton County 31 0 1 30 2%
Lake County 76 0 2 74 1%
Boone County 13 0 0 13 0%
Stark County 7 0 0 7 0%
Henderson County 6 0 0 6 0%
Iroquois County 6 0 0 6 0%
Jasper County 5 0 0 5 0%
Perry County 5 0 0 5 0%
Richland County 5 0 0 5 0%
Brown County 4 0 0 4 0%
Cass County 4 0 0 4 0%
Johnson County 4 0 0 4 0%
Jo Daviess County 3 0 0 3 0%
Mercer County 3 0 0 3 0%
Shelby County 3 0 0 3 0%
Wabash County 3 0 0 3 0%
White County 3 0 0 3 0%
Calhoun County 2 0 0 2 0%
Greene County 2 0 0 2 0%
Lawrence County 2 0 0 2 0%
Scott County 2 0 0 2 0%
Alexander County 1 0 0 1 0%
Clay County 1 0 0 1 0%
Coles County 1 0 0 1 0%
Crawford County 1 0 0 1 0%
Gallatin County 1 0 0 1 0%
Hamilton County 1 0 0 1 0%
Saline County 1 0 0 1 0%
Union County 1 0 0 1 0%
Wayne County 1 0 0 1 0%

What This Means for Illinois Residents

Illinois has a relatively low encryption rate of 8%. The majority of public safety agencies (1778 out of 2097) still broadcast in the clear, meaning scanner listeners and journalists retain access to most emergency radio traffic.

Encryption status can change at any time as agencies upgrade equipment or adopt new policies. The RTDNA considers police radio encryption the #1 threat to journalism in America. Use our search tool to check specific cities and counties in Illinois.

Frequently Asked Questions

Is police radio encrypted in Illinois?

In Illinois, 36 out of 2097 tracked public safety agencies use fully encrypted radio, and 283 use partial encryption. The overall encryption rate is 8%. Use the search tool on the homepage to check specific cities and counties.

Can I listen to police scanners in Illinois?

Yes — 1778 agencies in Illinois still broadcast in the clear and can be monitored with a scanner. Check specific agencies using our search tool for detailed channel information.

How often is Illinois data updated?

Data for Illinois is synchronized weekly from RadioReference.com. Encryption status reflects the latest known radio configurations, though agencies can change their setup without notice. Report incorrect data.

Source: RadioReference.com · Updated weekly · Methodology

Search all 2097 agencies in Illinois →

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