Montgomery County, Maryland Jail & Detention Facility Guide
Confirm the current jail or detention location through the responsible Montgomery County agency before mailing, paying, visiting, calling, or traveling. This page combines county-specific geography, official-source routing, state corrections guidance, and transfer checks without inventing an unverified facility list.
Facility search: quick answer
Montgomery County Detention Center snapshot
| Operator | Montgomery County Department of Correction and Rehabilitation |
|---|---|
| Published address or location context | 1307 Seven Locks Road, Rockville, MD 20854 |
| Custody coverage | People whose current Montgomery County correctional custody can be confirmed by the Inmate Records Section |
| Search method | Official county 311 custody guidance: call the Inmate Records Section, open 24/7, with the person's identifying information |
| Release/history limitation | This is a phone-assisted current-custody check, not a public roster, statewide prison search, federal locator, or complete released-person history |
| Public phone | 240-777-9732 |
County profile for facility verification
The Census Bureau Vintage 2025 estimate for Montgomery County is 1,074,582 residents, compared with 1,060,926 in 2020. The estimated change was +13,656 people (1.3%). It ranks #1 among 24 county equivalents in Maryland.
| Jurisdiction fact | Value | Facility-search relevance |
|---|---|---|
| Official Census name | Montgomery County | Confirms the county-equivalent connected to the facility search |
| GEOID | 24031 | Distinguishes same-named counties and cities |
| County-equivalent type | County | Explains the jurisdiction model |
| 2025 resident population | 1,074,582 | Provides jurisdiction scale; it is not jail population or capacity |
| Adjacent jurisdictions | 6 | Supports nearby checks during regional or cross-county housing |
How to confirm the current facility
- Open the parent Montgomery County inmate-search guide and identify the responsible sheriff, corrections department, detention center, regional jail, state agency, or other custodian.
- Use the verified custody method linked above.
- Confirm the exact facility name, booking or inmate number, current status, and jurisdiction.
- Open the official facility or agency page before sending mail, money, documents, or planning a visit.
- Reconfirm the location after court, medical transport, classification, contract placement, or transfer.
Why a jurisdiction can use more than one detention location
Local jail custody is normally handled by the responsible sheriff, county corrections department, detention center, regional jail, or another agency designated by the local government. State-prison and federal custody use separate systems. A jurisdiction may use an intake center, main jail, annex, work-release center, city jail, regional authority, juvenile facility, medical unit, courthouse holding area, or contracted beds. The public agency result or official information line is the best current source for where an adult is housed.
Facility details to verify
| Detail | Why it matters | Where to verify |
|---|---|---|
| Official facility name | Prevents confusion with an old, renamed, closed, or informal jail name | Responsible agency or current inmate result |
| Operating agency | Identifies the correct locator, phone, mail, money, and visitation rules | Sheriff, corrections, regional authority, state, or contracted public portal |
| Street and mailing address | Physical location and inmate-mail address can differ | Current official facility page |
| Public information phone | Confirms urgent transfer or release questions when published | Official contact page |
| Custody population served | A building may handle intake, pretrial, sentenced, work-release, medical, or another group | Agency facility description |
| Search relationship | Shows whether the county search covers the facility or another system must be used | Locator coverage statement |
Mail, money, visitation, and phone services
Do not use a facility address or vendor from an old third-party page. Open the current official sheriff, corrections, jail, regional authority, or facility page and confirm the recipient format, inmate number, permitted items, vendor, visitation approval process, schedule, identification requirements, and communication rules. Transfers can invalidate previously correct instructions.
When the facility shown online changes
A location can change after court, classification, sentence, disciplinary action, medical care, protective placement, overcrowding, regional placement, contract housing, state transfer, federal hold, or release processing. A changed location does not by itself explain the person’s legal status.
State and federal alternatives
If the person has entered state custody, use the Maryland state inmate-search guide. The state agency is Maryland Department of Public Safety and Correctional Services and the published state tool is Incarcerated Individual Locator. If federal custody is confirmed, use the federal BOP guide.
Nearby county searches
Frederick County inmate search
Maryland · GEOID 24021
Howard County inmate search
Maryland · GEOID 24027
Prince George's County inmate search
Maryland · GEOID 24033
Arlington County inmate search
Virginia · GEOID 51013
Fairfax County inmate search
Virginia · GEOID 51059
Loudoun County inmate search
Virginia · GEOID 51107
How this guide avoids stale facility data
The parent county has a verified official custody pathway, but current facility details still must be reconfirmed before action.