Reviewed and updated October 11, 2026 by the SearchSystems.net editorial team. The arrest counts are the ones each agency reported to the FBI, as the FBI held them on October 8, 2026. Every office link was opened and checked against the office's own site between September 23, 2026 and October 11, 2026.
Marathon, Florida, in Monroe County, has about 10,000 residents (2024 Census Bureau estimate). In Florida the public criminal record is the court file, kept by the Clerk of the Circuit Court and Comptroller; the statewide criminal history kept by the Florida Department of Law Enforcement is open to anyone who asks. This guide says where each record of a criminal case from Marathon is kept and how it is seen.
This guide covers the court file, the statewide record, local arrest records, sex offender registry, records requests and common questions.
Related guides: Marathon public records, Monroe County criminal records, Marathon arrest records, Marathon warrants, Marathon inmate search, Marathon court records, Florida arrest records and Florida inmate search.
Criminal Cases in the Monroe County Circuit Court
In Florida the public criminal record is the court file. Criminal cases from Marathon are heard by the Monroe County Circuit Court, which hears felonies, civil cases over $50,000, divorces, probate and juvenile matters; the County Court takes misdemeanors, traffic cases, small claims and civil cases up to $50,000, and the file of each case is kept by the Clerk of the Circuit Court and Comptroller.
For Monroe County, SearchSystems opened and checked the court records page for the county at monroecounty-fl.gov/m/directory/department?did=75 (page title: Staff Directory, Clerk of The Court (Key West)), phone 305-295-3130, 500 Whitehead Street Key West, FL 33040, Monday-Friday 8:30 a.m. to 5 p.m., which answered when SearchSystems opened it on October 11, 2026.
Florida has no single public index of every trial court case; each court's records are looked up through that court.
The Florida Criminal History and Your Own Copy
Florida is one of the states that lets anyone look up another person's statewide criminal history: anyone can run a name-based criminal history search online for $24, for $24 a search, through the Florida Department of Law Enforcement. The result is the repository record, what agencies reported to the state, which is wider than one county's court index but can lag it. The search is on the Florida Department of Law Enforcement site.
Arrest Records Kept Locally in Marathon
The Monroe County Sheriff's Office and the agencies that report for Key West and Key Colony Beach keep the arrest records in and around Marathon: the report and the booking record of each arrest stay with the agency that made it, separate from the court file and from the state repository.
The FBI's agency list also places one state police unit and five state agencies in Monroe County (the arrest records guide names each one); each keeps the records of its own arrests.
Together, the two agencies in Monroe County with all twelve months of 2025 on file reported 4,300 arrests to the FBI that year; how each case ended is in the court file, not in the arresting agency's.
The agencies and their counts, year by year, are in Marathon arrest records.
The Sex Offender Registry for Marathon
Registered sex offenders living in Marathon are listed on the Florida Sexual Offenders and Predators Registry, run by the Florida Department of Law Enforcement at offender.fdle.state.fl.us. The registry is public and can be searched online.
Registration itself is done in person with the local agency where the registrant lives: the sheriff's office, or the city police in a city with its own department.
Asking an Agency in Monroe County for a Record
An arrest report, a booking record or a local criminal history letter comes from the agency that holds it, not from the court.
Under the Florida Public Records Act (Chapter 119) a county office must answer a request promptly and in good faith; the statute sets no number of days, and it may charge the copy fees set by statute, plus a special service charge for large requests.
Frequently Asked Questions
Are criminal records public in Marathon?
The court files of criminal cases are public, and so is the statewide criminal history kept by the Florida Department of Law Enforcement: anyone can run a name-based criminal history search online for $24, for $24. The arrest report itself is released by the agency that made the arrest, under the Florida Public Records Act (Chapter 119).
Can I search Marathon criminal cases online?
The court records page SearchSystems verified for the county is at monroecounty-fl.gov (page title: Staff Directory, Clerk of The Court (Key West)).
How do I get my own Florida criminal history?
Through the same search, run on yourself.
Is this the official Marathon website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official city, county, court and state offices described above and does not hold records, charge for them or take requests.