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California State Prison, Solano
California State Prison, Solano (SOL) contact, address, visiting, phone, mail and travel details. Confirm custody and current rules with the responsible agency.
Facility record · California
SOL · Vacaville · Solano County
- SecurityLevels II–III
- Population2,925
- Occupancy154%
Jail411 holds no custody records. A listing here does not mean anyone is held at this address.
California State Prison, Solano (SOL) is a state prison in Vacaville, Solano County, California. By capacity it is the 25th-largest of the 30 state prison records listed for California with a published capacity. It is one of 7 correctional facilities in Solano County, and California operates 30 state prisons in total.
Contact & details
CDCR Infrastructure Master Plan, Appendix 1 (May 2026), period ending 30 April 2026
Finding someone first
Nothing below works without two things: confirmation that the person is at California State Prison, Solano, and their CDCR number. Book a visit without them and you will be turned away; post a letter without the number and the mailroom cannot route it.
CDCR's public search covers people in CDCR custody. A disclaimer must be accepted before searching, and CDCR states the tool is informational rather than an official record. County jail populations are held separately.
CIRIS — California Incarcerated Records and Information Search ↗
Visiting California State Prison, Solano
This is what the institution publishes, in the order you will meet it: when visits run, how to get approved, how to book, when to arrive, and what you may carry in.
When visits run
Visiting open · 11 August 2026Get approved
You must be approved before booking. The incarcerated person first sends you a signed CDCR Form 106 Visiting Questionnaire. Complete that exact copy, then mail it directly to SOL’s Visiting office.
Send it to: Mail the completed questionnaire to California State Prison Solano, Attention: Visiting, P.O. Box 4000, Vacaville, CA 95696-4000.
What not to do: Do not mail the completed questionnaire back to the incarcerated person. Send it directly to SOL’s Visiting office at the institution address above.
Book through the scheduling application
Use VSA for regular contact visits. The request window opens eight days before the visit at 6:00 a.m. and closes five days before at 11:59 p.m.; appointment times are processing times.
Open the Visitation Scheduling Application ↗
Walking in: Friday passes start at 12:30 p.m. and visiting at 2:30 p.m. Weekend passes start at 8:30 a.m. and visiting at 10:30 a.m. Capacity can prevent a number from being called.
Non-contact and restricted-housing visitsNon-contact visiting is not a choice — it is what applies while someone is in reception (newly admitted to CDCR, or just transferred between prisons) or is segregated.
Arrive, and report to visitor processing
Plan to arrive at least one hour before a scheduled visit. Processing waits vary and can occasionally reach two hours.
Parking: Visitor parking is on the Level II side in the main or gravel lots and on the Level III side in the lower or gravel lots. Do not use spaces marked as assigned parking.
Where to report: Use SOL’s Level II or Level III visiting entrance at 2100 Peabody Road, based on the person’s current housing. Scheduled visitors may enter the grounds 30 minutes before the appointment processing time.
Bring the right things, and only those
Allowed in
- Only CDCR's limited authorized items may enter: approved cash, a small clear bag, up to two keys, ID, limited photos/documents, and specified medical, religious, disability, or baby items. Leave unlisted personal items secured outside and confirm institution-specific restrictions.
Identification: Adults need valid, current photo ID (state driver's license/ID, armed-forces ID, ICE ID, U.S. or foreign passport, or Mexican Consulate photo ID). Minors need the required certified birth certificate and, depending on the accompanying adult, guardianship proof or an annually renewed notarized consent form.
How many may visit: You may schedule one visit per visiting day. Every visitor must be listed on the original appointment; if the appointment holder does not arrive, the listed guests must seek walk-in processing.
Bringing a child: A visitor under 18 must be accompanied by an approved adult. Required documents depend on whether the adult is a parent, legal guardian, or another authorized person. CDCR also allows specified baby supplies in a clear diaper bag.
Video visits and cost: Weekend video visiting at adult institutions ended in July 2023. CDCR states eligible people with tablets receive a free 15-minute video call every two weeks.
Phone calls, money and mail
Phone calls
You cannot call in. CDCR states that it is up to the incarcerated person to initiate the call, and that calls are limited to 15 minutes. That single fact explains most of what families find confusing: the switchboard will not connect you, there is no voicemail, and a call arriving from an unfamiliar number is normal. What you can do from the outside is make sure the call can reach you — that your number is not blocked by your carrier, that it is not a VoIP or virtual number the system will refuse, and that whatever account arrangement the facility uses is set up and funded before he tries. For anything urgent, a message goes through the institution rather than the phone system.
Putting money on the books
Before anything else you need the person's CDCR number, from California Incarcerated Records and Information Search (CIRIS), and their current location from CDCR's facility locator. CDCR then lists three routes. Electronic funds transfer through one of its vendors: GTL/ConnectNetwork, JPay, or Access Corrections. A lock box deposit, which CDCR states carries no fee when sent by money order, personal check or cashier's check: complete the Money Order Deposit Form with the sender's name and address, make the payment payable to JPay, and mail it to JPay, 2202 South Figueroa St, Box #3001, Los Angeles, CA 90007. CDCR caps this at $999.99 per money order, holds personal checks for ten business days, and warns that any letter or note enclosed with a payment will be discarded. Or send a check or money order to the institution itself. Vendor fees vary by amount and method, so check the vendor's own figure before you send.
Writing to someone here
Anyone may write to a person in a California state prison. Incoming letters are opened and inspected for contraband, then forwarded. CDCR asks that the envelope carry the person's full committed name and CDC number, the institution name, the P.O. box and housing assignment where known (CDCR states housing is preferable), and the city, CA and ZIP. The housing assignment is the part most people do not have: get it, and the CDCR number, from California Incarcerated Records and Information Search (CIRIS), from the institution's Public Information Officer, or from CDCR's Identification Unit. Note that the address mail goes to is not always the institution's street address, so confirm it before posting anything you cannot replace.
Full committed name · CDCR number · housing
California State Prison, Solano (SOL)
P. O. Box 4000, Vacaville, CA 95696-4000
Getting there, and staying
Vacaville has several I-80 lodging options. These are planning choices, not endorsements; confirm the actual route to Peabody Road, exact room, accessibility, parking, deposit and cancellation deadline. Vacaville City Coach runs local fixed routes and an on-demand City Coach Direct service. Current city records identify a Peabody Road/Prison Drive stop, but route assignments and schedules change.
Where to stay
Somewhere to eat
| Place | What and when | Phone |
|---|---|---|
| Denny’s1701 E. Monte Vista Avenue, Vacaville, CA 95688 | Official page lists 24-hour service, all-day breakfast, pickup and delivery | (707) 448-0660 |
| Subway1909 Peabody Road, Suite 5, Vacaville, CA 95687 | Official location page lists weekend opening at 8:00 a.m.; pickup, delivery and in-restaurant dining are available | (707) 446-1111 |
Local planning notes
Road check: Check Caltrans QuickMap and SOL’s live page. Confirm any current non-contact-phone outage before booking a behind-glass visit.
Inside the institution
Four separate semi-autonomous facilities, a 125-bed Administrative Segregation Unit, and a 16-bed Correctional Treatment Center.
Restricted housing
The official facility page lists a 125-bed Administrative Segregation Unit.
Health care, programs and release preparation
These services differ by institution. The details below describe what this prison reports, not a systemwide promise that every person qualifies for every program.
Health care
The site identifies CCHCS health-care leadership and a 16-bed Correctional Treatment Center.
Education, training and work
Programs include adult basic education, GED, literacy, college and voluntary education, plus carpentry, fiber optics/electronics, masonry, building maintenance, office technology, computer literacy, residential electrical, welding, and PIA industries.
Preparing for release
The prison offers many self-help and reentry programs, including veteran reentry preparation, PREP, parenting, substance-use treatment, job/vocational preparation, family liaison services, and a visitor center that assists families.
Reported figures
These are the institution’s own returns to the state, and every group is dated. They have to be: the figures come from separate documents on separate cadences, and reading the whole set as one snapshot would be wrong.
Capacity and population
as at 30 April 2026How the population is housed
as at 30 June 2024Staffing
as at 30 June 2024Education and training
as at 30 June 2024CDCR Infrastructure Master Plan, Appendix 1 (May 2026) (Public record) · California Department of Corrections and Rehabilitation, SB601 Reporting (CC BY 4.0)
Guides that go wider than this institution
These cover the same ground across every facility in the directory, which is what you want if the person may be moved, or if you are helping someone in a different state.
Other facilities in Solano County
Clear information.
Clear boundaries.
Jail411 is an independent information resource for families and friends. We are not a government agency, jail operator, law firm or live custody-records service.
Can Jail411 tell me if someone is in custody right now?
No. Jail411 does not hold live custody records. Use the official locator for the county, state, federal or ICE system that has the person; start here if you do not know which.
Does posting bond mean the person comes home?
Not always. A probation or parole hold, another county's warrant or an immigration detainer can keep someone in custody after bond is posted. Ask the jail what holds are on the booking before you pay.
What should I confirm before visiting?
The person's current facility, the visiting schedule, approval requirements, accepted identification and arrival instructions. Check the facility page and its official sources before you travel.
What if I find something that needs correcting?
Send us the page and the detail that needs attention. Include the official source when you have one. Do not send private booking documents or other sensitive personal information.
Plan the next step.
Practical guides for calls, visits, mail, money and release.