Reviewed and updated October 9, 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. The jail figures are from the Vera Institute of Justice's Incarceration Trends data. Every office link was opened and checked against the office's own site between September 23, 2026 and October 2, 2026.
Marietta, Georgia, in Cobb County, has about 63,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Marietta is held at the county jail, run by the Cobb County Sheriff's Office, and the jail's record of each person held is a public record. This guide says where to look for someone in custody, what the jail holds and who books people into it.
This guide covers the search, the jail, who books people, state prison and common questions.
Related guides: Marietta public records, Cobb County inmate search, Marietta arrest records, Marietta warrants, Marietta criminal records, Marietta court records, Georgia arrest records and Georgia inmate search.
Finding Someone in Custody in Marietta
A person kept in custody after an arrest in Marietta is held at the county jail, run by the Cobb County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the jail page of the Cobb County Sheriff's Office at cobbsheriff.org/inmates/adult-detention-center/custodial-information (page title: Cobb County Sheriff's Office | Custodial Information:), phone (770) 528-8975, Monday through Friday, during the hours of 8:00 A.M. to 5:00 P.M., which answered when SearchSystems opened it on September 23, 2026.
That page is the office's jail information page rather than a roster, so a search for a particular person goes through the office at (770) 528-8975.
The Cobb County Jail by the Numbers
So far in 2026 the jail has held about 2,140 people on an average day, down from about 2,170 in 2019. Its rated capacity is 3,067 beds, and it is running at 70 percent of it. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Cobb County has about 788,000 residents (2024 Census Bureau estimate), so the jail holds about 27 people for every 10,000 residents.
Who Books People Into the Cobb County Jail
The Cobb County Sheriff's Office, the Cobb County Police Department and the agency that reports for Marietta (filed by the FBI as Marietta Police Department) make the arrests that end in a booking in and around Marietta.
The FBI's agency list also places these agencies in Cobb County: Kennesaw State University (campus police); Cobb County Board of Education (other agency); the State Patrol at Marietta (state police).
The largest arrest counts reported to the FBI were the Cobb County Police Department's 6,359 for 2025, Marietta's 2,001 for 2025 and Kennesaw's 1,041 for 2025.
Together, the eight agencies in Cobb County with all twelve months of 2025 on file reported 10,533 arrests to the FBI that year. Those kept in custody were booked into the county jail; a person cited and released at the scene was not.
The counts, agency by agency and year by year, are in Marietta arrest records.
From the Jail to State Prison
The jail holds people awaiting trial and people serving short sentences. A person sentenced to prison in Cobb County serves the sentence in a facility of the Georgia Department of Corrections, whose inmate locator is at gdc.georgia.gov/offender-info/find-offender.
Frequently Asked Questions
How do I find an inmate in Marietta?
Ask the Cobb County Sheriff's Office at (770) 528-8975; its jail page SearchSystems verified is at cobbsheriff.org.
How many people are in the Cobb County jail?
About 2,140 on an average day so far in 2026, against a rated capacity of 3,067 beds.
What is the phone number for the Cobb County jail?
(770) 528-8975, the number on the page of the Cobb County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Cobb County go?
To a facility of the Georgia Department of Corrections; its inmate locator is at gdc.georgia.gov/offender-info/find-offender.
Is this the official Marietta 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.