Sonoma County Main Adult Detention (MADF)

County Jail

Last Updated: April 10, 2023
2777 Ventura Ave, Santa Rosa, CA 95403

Sonoma Co MADF is for County Jail offenders sentenced up to twenty four months.

All prisons and jails have Security or Custody levels depending on the inmate’s classification, sentence, and criminal history. Please review the rules and regulations for County - medium facility.

The phone carrier is Global Tel Link (GTL) - ConnectNetwork, to see their rates and best-calling plans for your inmate to call you.

If you are unsure of your inmate's location, you can search and locate your inmate by typing in their last name, first name or first initial, and/or the offender ID number to get their accurate information immediately Registered Offenders

Satellite View of Sonoma County Main Adult Detention (MADF)

You can support your loved ones at Sonoma Co MADF on InmateAid, if you have any immediate questions contact the facility directly at 707-565-1400.

When someone you care about gets locked up, it's tough to figure out all the ins and outs of jail life. From sending mail to visiting, there are a lot of things to sort out. And getting info about the arrest? Not always easy. That's where this webpage comes in handy. It's here to help you get a handle on how things work at Sonoma County Main Adult Detention (MADF) so you can stay connected and support your loved one behind bars.

The Sonoma Co MADF is a detention center located at 2777 Ventura Ave Santa Rosa, CA which is operated locally by the Sonoma County Sheriff's Office and holds inmates awaiting trial or sentencing or both. Most of the sentenced inmates are here for less than two years. Sonoma County accepts inmates from surrounding towns, Santa Rosa Police Department, and the US Marshal's Service.

New detainees arrive at the jail regularly, with some being released on bail, placed under pretrial services caseloads, supervised by probation agencies, or released on recognizance with a court appearance agreement. Those who are not released await their court appearances at the jail, receiving accommodations including bedding and meals. You can see all the arrest records for California here.

The Sonoma County Sheriff's Office Detention Division is responsible for the processing, care, and management of individuals held in lawful detention. With a staff of over 300 employees, the Detention Division is committed to serving the people of the State of California and County of Sonoma by providing a secure, safe, and humane environment for both the staff and inmates.

The Detention Division's goals in support of this mission are:

  • To comply with California Minimum Jail Standards and all other applicable federal, state, and local laws and the standards set forth by the California Medical Association;
  • To apply the principles of direct supervision as developed by the National Institute of Corrections;
  • To develop and support staff through constructive supervision, leadership and training, and maintenance of high employment standards;
  • To offer inmates an opportunity for rehabilitation through participation in religious, educational, recreational, vocational, and work programs;
  • To release inmates back into the community in better condition medically & psychologically than when they came into custody;
  • To manage our resources in a professional, efficient, and cost-effective manner;
  • To foster a custodial environment that supports positive inmate behavior and provides discipline for misconduct.

Inmate Locator

To utilize the Inmate Search page on InmateAid, begin by selecting the relevant prison facility in California. This allows you to view the current list of inmates housed at Sonoma County Main Adult Detention (MADF).

The second section features the InmateAid Inmate Search tool, providing a user-generated database of inmates. You can access this resource to utilize any of InmateAid's services. If you require assistance in creating an inmate profile to maintain communication, please contact us at, and we'll gladly help you locate your loved one.

As a last resort, you might have to pay for that information if we do not have it. The Arrest Record Search will cost you a small amount, but their data is the freshest available and for that reason, they charge to access it.

Visitation Information

Sonoma County Main Adult Detention - Visitation

Non-Contact Visiting:

  • Inmates booked with the last name beginning with A-L will visit on Saturday and Monday for all visiting times. There will also be a half-day visiting on Wednesday. Visiting times on Wednesday for A-L will be 10:15 am, 11:00 am, 1:00 pm, 1:40 pm, 2:20 pm, and 3:00 pm.
  • Inmates booked with the last name beginning with M-Z will visit on Sunday and Tuesday for all visiting times. There will also be a half-day visiting on Wednesday. Visiting times on Wednesday for M-Z will be 4:25 pm 7:00 pm, 7:45 pm, 8:30 pm, 9:15 pm, and 9:50 pm
  • The following holidays will have visiting, and the hours will follow the Wednesday schedule: New Year’s Day, Independence Day, Thanksgiving Day and Christmas Day
  • All visits are ½ hour in duration.
  • Inmates may receive one visit per visitation day.
  • Module Workers are eligible to receive two 30-minute visits per day on their visiting day. Visits can be consecutive if time and space permits.

Morning (Time frames listed in parentheses indicate sign-in time)

  • 10:15 (9:30-9:50)
  • 11:00 (10:15-10:35)


  • 1:00 (12:15-12:35)
  • 1:40 (1:10-1:25)
  • 2:20 (1:50-2:05)
  • 3:00 (2:30-2:45)
  • 4:25 (3:55-4:10)


  • 7:00 (6:20-6:40)
  • 7:45 (7:05-7:25)
  • 8:30 (7:50-8:10)
  • 9:15 (8:35-8:55)
  • 9:50 (9:10-9:30)


  • Shorts, skirts and dresses must be as long as the bottom of the fingertips when arms are placed atside.
  • No bare midriffs or low-cut tube tops, or revealing tops.
  • No tank tops
  • No sports team attire or gang insignias.
  • No bandanas, beanies, hairnets or hats.
  • No steel-toed boots or shoes that will not clear the metal detector.

If you are unsure about your attire’s acceptability, you want to dress as if you were going to court. Final determination of clothing will be made by Lobby staff.

General Information:

  • Visitors may only fill two seats in the visiting booths. Small children (40 inches or smaller) may be held on a visitor’s lap. Children over 40 inches must occupy a seat and will be counted as a visitor as required by occupancy rating.
  • All visitors, 18 years and older, must have a valid and current California Driver’s License, California Identification Card, Driver’s License/ID from another state, Passport, Military ID, Consular Card or Immigration Card. No other forms of ID will be accepted.
  • Minors (age 17 and under) Adults with minors must supervise them at all times. If the adult visitor is the minor’s parent, they must bring the minor’s birth certificate. If the adult visitor is a legal guardian, they must present court papers showing they are the legal guardian. If the adult visitor is neither the parent or legal guardian, they must provide a notarized letter from a parent or legal guardian permitting the visit along with the minor’s birth certificate or official court document. Emancipated minors are allowed to visit with original court documentation as proof of emancipation. Photocopies of the above documents are not acceptable.
  • Convicted felons who wish to visit must have prior written approval from the Facility Manager or their designee.
  • If you are a recently released inmate of the Detention Division, you must wait for 30days from the day of your release before returning to visit unless you are visiting your spouse. Items Allowed: Locker or Vehicle key or remote, visitor’s pass, eyeglasses, baby-bottle if needed (must clear metal detector) and any emergency medications. Items Not Allowed: Weapons of any kind, cigarettes, lighters, full sets of keys, knives, cell phones, hats, excessive jewelry, toys, and writing implements. Visitors are required to secure all of their property in the lockers provided in the lobby or in their vehicles, use is at own risk. Visitors must be able to clear the metal detector to visit. Lockers are cleared nightly after visiting. Any items left in a locker after visiting hours are complete will be disposed of. Any person who appears to be under the influence of alcohol or any controlled substance will not be allowed to visit. Appropriate behavior and conduct will be required at all times.


Ask The Inmate

Ask a former inmate questions at no charge. The inmate answering has spent considerable time in the federal prison system, state and county jails, and in a prison that was run by the private prison entity CCA. Ask your question or browse previous questions in response to comments or further questions of members of the InmateAid community.