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 September 25, 2026.
Rio Grande City, Texas, in Starr County, has about 16,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Rio Grande City is held at the county jail, run by the Starr 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: Rio Grande City public records, Starr County inmate search, Rio Grande City arrest records, Rio Grande City warrants, Rio Grande City criminal records, Rio Grande City court records, Texas arrest records and Texas inmate search.
Finding Someone in Custody in Rio Grande City
The county jail, run by the Starr County Sheriff's Office, holds everyone kept in custody after an arrest in Rio Grande City, from every agency.
SearchSystems opened and checked the jail page of the Starr County Sheriff's Office at co.starr.tx.us/page/Sheriff (page title: Sheriff | Starr County, Texas), phone 956-487-5571, 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 956-487-5571.
The Starr County Jail by the Numbers
So far in 2026 the jail has held about 300 people on an average day, up from about 240 in 2019. Its rated capacity is 321 beds, and it is running at 94 percent of it. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Starr County has about 67,000 residents (2024 Census Bureau estimate), so the jail holds about 45 people for every 10,000 residents.
Who Books People Into the Starr County Jail
The Starr County Sheriff's Office and the agency that reports for Rio Grande City (filed by the FBI as Rio Grande City Police Department) make the arrests that end in a booking in and around Rio Grande City.
The FBI's agency list also places these agencies in Starr County: the Starr County Constable's Precinct 4, the Roma Independent School District and the Rio Grande City Independent School District (other agency).
The largest arrest counts reported to the FBI were Roma's 312 for 2025, Rio Grande City's 195 for 2025 and the Starr County Sheriff's Office's 75 for 2024.
Together, the three agencies in Starr County with all twelve months of 2025 on file reported 510 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 Rio Grande City arrest records.
From the Jail to State Prison
A sentence of more than a year is served in state prison, not the jail; the Texas Department of Criminal Justice lists its inmates at inmate.tdcj.texas.gov/InmateSearch/start.
Frequently Asked Questions
How do I find an inmate in Rio Grande City?
Ask the Starr County Sheriff's Office at 956-487-5571; its jail page SearchSystems verified is at co.starr.tx.us/page/Sheriff.
How many people are in the Starr County jail?
About 300 on an average day so far in 2026, against a rated capacity of 321 beds.
What is the phone number for the Starr County jail?
956-487-5571, the number on the page of the Starr County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Starr County go?
To a facility of the Texas Department of Criminal Justice; its inmate locator is at inmate.tdcj.texas.gov/InmateSearch/start.
Is this the official Rio Grande City 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.