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The License-Plate Reader File · MarylandIn reporting · updated Oct. 29, 2026

Who is reading your plate?
County by county.

Maryland law since 2014 limits police use of plate-reader data to legitimate law enforcement purposes and requires yearly reports to the legislature; the State Police report for 2025 counted 1,077 reader units connected to the state fusion center and about 1.19 billion reads from 19 agencies.

License-plate readers in other states →

A county’s color reflects any documented agency in it: the sheriff’s office or a city police department. “Not yet checked” is not the same as “none”.

Using license-plate readers
In use; some cameras may have been switched off or removed.
Removing or limiting cameras
Removing cameras beyond state roads, or limiting use, while some remain.
Use suspended
Cameras switched off or use paused; no contract termination reported.
Program documented, current use unconfirmed
Records or reports show the agency bought or used plate readers, but no source found confirms whether they are still in use.
Ended or removed
Contract terminated, program discontinued, or all cameras removed.

Statewide

  1. April 14, 2014 The governor signed SB 699 (Chapter 192 of 2014), effective Oct. 1, 2014. It limits police use of captured plate data to a "legitimate law enforcement purpose," shields reader data from the Public Information Act, requires the State Police and agencies using readers to adopt operating and audit procedures, and requires annual reports to the General Assembly starting in 2016. (Maryland General Assembly, April 14, 2014; Maryland Department of Legislative Services, 2015)
  2. March 18, 2015 The House Judiciary Committee gave an unfavorable report to HB 417, which would have barred police from stopping a driver solely because plate-reader data showed the owner held a handgun carry permit. A similar bill, HB 1398, was filed in 2017; the legislature's site shows a March 14 hearing scheduled and no later action. (Maryland General Assembly, March 18, 2015; Maryland Department of Legislative Services, 2015; Maryland General Assembly, 2017)
  3. Oct. 1, 2015 MCAC sent its model audit policy for plate-reader data, developed in August 2015, to all Maryland law enforcement agencies. Under it, agencies audit a random sample of at least 1% of searches (minimum 50). (Maryland State Police / Maryland Coordination and Analysis Center (via Department of Legislative Services Library), March 5, 2025; Maryland Department of State Police / Maryland Coordination and Analysis Center (via Department of Legislative Services Library), March 1, 2026)
  4. May 16, 2024 The governor signed HB 1081 and SB 840 (Chapters 875 and 876 of 2024), effective Oct. 1, 2024. The law covers plate data stored in the cloud, makes captured data the property of the agency that collected it, bars its sale, allows certain data to be uploaded to MCAC, and extends penalties to vendors working for police. The House passed it 119-17 and the Senate 47-0. (Maryland General Assembly, May 16, 2024; Maryland General Assembly, 2024)
  5. Feb. 4, 2025 MCAC's report to legislators for calendar 2024 counted 857 reader units connected to the center and 1,010,086,796 reads retained from 18 agencies. It logged 5,221 requests to the center, 732 of them federal (609 resulting in a release), and reported no breaches. (Maryland State Police / Maryland Coordination and Analysis Center (via Department of Legislative Services Library), March 5, 2025)
  6. Feb. 27, 2026 MCAC's report for calendar 2025 counted 1,077 reader units connected to the center and 1,188,559,099 reads from 19 agencies. It logged 4,737 requests, 674 of them federal (570 resulting in a release), and reported no breaches. MCAC said it could not confirm that the agencies whose reports it forwarded were the only ones in Maryland using plate readers. (Maryland Department of State Police / Maryland Coordination and Analysis Center (via Department of Legislative Services Library), March 1, 2026; The Baltimore Sun (via WBFF FOX45), Aug. 25, 2026)
  7. Aug. 2026 After a Baltimore Sun analysis of the state reports, Sen. Charles Sydnor III (D-Baltimore County) said his office had begun collecting information to decide whether more legislation is needed. In October, The Banner reported that Sydnor, Senate Minority Leader Steven Hershey and Del. N. Scott Phillips want the 2027 session to look at private-sector plate readers, which state law does not regulate. (The Baltimore Sun (via WBFF FOX45), Aug. 25, 2026; The Baltimore Banner, Oct. 1, 2026)

State agencies

Maryland State Police (Maryland Coordination and Analysis Center)

Status
Using license-plate readers
Vendors
Vendor not named in source
Cameras
Count not documented
No unit count given for the State Police's own readers. MCAC runs the state's central plate-data server, and 1,077 units statewide were connected to it in 2025.
  1. Feb. 4, 2025 MCAC reported 73,402,736 reads from its own (State Police) readers in 2024, with 58 MCAC employees authorized to search the database. (Maryland State Police / Maryland Coordination and Analysis Center (via Department of Legislative Services Library), March 5, 2025)
  2. Feb. 27, 2026 MCAC reported 79,915,710 reads from State Police readers in 2025. It audited 80 of the 4,737 requests it received, and 58 employees were authorized to search. (Maryland Department of State Police / Maryland Coordination and Analysis Center (via Department of Legislative Services Library), March 1, 2026)
  3. April 1, 2026 In an April 1, 2026 letter on HB 1166, a front-plate bill, the State Police said plate readers used by Maryland law enforcement include fixed and mobile units, and that program figures show 30% to 40% of plates read by mobile units are front plates. (Maryland Department of State Police, Government Affairs Section, April 1, 2026)
Conflicts and open questions
  • Vendor not stated in the records found.

From agency records.

Maryland Transportation Authority Police

Status
Using license-plate readers
Vendors
Vendor not named in source
Cameras
126
126 cameras in 2025: 86 at nine fixed locations and 40 on 20 mobile units (124 in 2024).
  1. 2016 The State Police report for 2015 listed MDTA Police with 54,246,732 reads from fixed units and 1,519,931 from mobile units. (Maryland Coordination and Analysis Center, March 1, 2016)
  2. 2025 MDTA Police said its readers made 288,972,074 reads in 2024 and 303,253,851 in 2025, all sent to MCAC. Its own server keeps reads for no more than 14 days. MCAC's table counted 296,536,235 MDTA reads for 2025, the most of any agency. (Maryland State Police / Maryland Coordination and Analysis Center (via Department of Legislative Services Library), March 5, 2025; Maryland Department of State Police / Maryland Coordination and Analysis Center (via Department of Legislative Services Library), March 1, 2026)
  3. Feb. 19, 2026 The MDTA Office of Audits' compliance audit of 2025 plate-reader use (report INT 2026-07) found controls working and no reportable findings. (Maryland Department of State Police / Maryland Coordination and Analysis Center (via Department of Legislative Services Library), March 1, 2026)
Conflicts and open questions
  • The Banner (Oct. 1, 2026) gave 1.5 million reads for 2015, which matches the mobile-unit count in the 2016 state report only.
  • Report figures differ: MDTA's own total and MCAC's table for 2025 are not the same; both are given as filed.

From agency records.

Every county

All 24 counties
Allegany CountyProgram documented, current use unconfirmed1Leonardo (ELSAG)2
Anne Arundel CountyUsing license-plate readers3Flock Safety, Leonardo (ELSAG), Motorola Solutions232
Baltimore CountyUsing license-plate readers3Leonardo (ELSAG)93
Baltimore cityUsing license-plate readers1Axon, Leonardo (ELSAG)125
Calvert CountyUsing license-plate readers1Flock Safety—
Caroline CountyUsing license-plate readers1——
Carroll CountyChecked: no program found———
Cecil CountyUsing license-plate readers4Flock Safety28
Charles CountyUsing license-plate readers1Leonardo (ELSAG)—
Dorchester CountyChecked: no program found———
Frederick CountyUsing license-plate readers2Utility, Inc.21
Garrett CountyChecked: no program found———
Harford CountyUsing license-plate readers2Axon274
Howard CountyUsing license-plate readers1—25
Kent CountyChecked: no program found———
Montgomery CountyUsing license-plate readers3Axon, Leonardo (ELSAG), Rekor Systems860
Prince George's CountyUsing license-plate readers17Flock Safety483
Queen Anne's CountyNot yet checked———
Somerset CountyChecked: no program found———
St. Mary's CountyUsing license-plate readers1——
Talbot CountyNot yet checked———
Washington CountyUsing license-plate readers3Axon, Flock Safety35
Wicomico CountyUsing license-plate readers2Flock Safety40
Worcester CountyUsing license-plate readers2Flock Safety10

How this map is built

We start with each county’s sheriff’s office and its largest city police departments, then work outward. Each agency’s entry says whether it comes from agency records or from news reports, and links every source. Companies are tracked separately, so the map can show one company’s customers or all license-plate readers together.

Have a contract, invoice or records response for an agency here? Send it to tips@signaldata.org.

Sources