First Judicial District Attorney’s Office

Serving Our Communities.
Pursuing Justice.

Santa Fe County  •  Rio Arriba County  •  Los Alamos County
Our office works with victims, witnesses, law enforcement, courts and community partners to pursue justice and promote safer communities throughout the First Judicial District.
Mary Carmack-Altwies, First Judicial District Attorney
Mary Carmack-Altwies
District Attorney

How Can We Help?

Connect with the resources, services and community partnerships of the First Judicial District Attorney’s Office.

“Real change, enduring change, happens one step at a time.”

– Ruth Bader ginsburg

Court case lookup
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Look Up Your Court Case

Look up your case to confirm whether your hearing is in District Court or Magistrate Court.

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First Judicial District Courts

District Courthouses

Santa Fe District Courthouse
Santa Fe County

Santa Fe District Courthouse

225 Montezuma Ave
Santa Fe, NM 87501

Rio Arriba District Courthouse in Tierra Amarilla
Rio Arriba County

Rio Arriba District Courthouse

7 Main St
Tierra Amarilla, NM 87575

Los Alamos District Courthouse
Los Alamos County

Los Alamos District Courthouse

2500 Trinity Dr
Los Alamos, NM 87544

Before your court date: Check your court notice for the county, courtroom, date, and time. District Court and Magistrate Court are different court systems and are located in different buildings.
First Judicial District Courts

Magistrate Courthouses

Santa Fe County

Santa Fe Magistrate Court

Santa Fe

2056 Galisteo St
Santa Fe, NM 87505

Rio Arriba County

Rio Arriba Magistrate Court

Española

1127 Santa Clara Peak Rd
Española, NM 87532

Los Alamos County

Los Alamos Magistrate Court

Los Alamos

2500 Trinity Dr
Los Alamos, NM 87544

Check your court notice carefully to confirm the court location, date, time, and courtroom.
Our Office

Our Departments

Our office is made up of dedicated professionals who work together to pursue justice, support victims, and promote safer communities across Santa Fe, Rio Arriba, and Los Alamos Counties.

Prosecution

Prosecution

Attorneys and legal teams responsible for reviewing cases, preparing prosecutions, and representing the State of New Mexico in court.

Victim Advocacy

Victim Advocacy

Advocates who support victims throughout the criminal justice process and connect them with information, services, and community resources.

Investigations

Investigations

Investigators who assist prosecutors with case preparation, evidence review, witness coordination, and follow-up investigation.

Case Intake and Diversion

Case Intake & Diversion

Teams responsible for case referrals, intake, screening, and identifying appropriate diversion options when available.

Legal Support

Legal Support

Paralegals and legal professionals who support attorneys and ensure cases are organized, prepared, and ready for court.

Administrative Support

Administrative Support

Administrative professionals and support staff who keep our office running efficiently and support our mission every day.

Together, these departments work as one team to uphold the law, seek justice, and serve our communities with integrity and compassion.

New Mexico’s First Judicial District

Serving Northern New Mexico

The First Judicial District Attorney’s Office serves Santa Fe, Rio Arriba, and Los Alamos Counties — representing communities across a diverse and expansive region of Northern New Mexico.

Map of New Mexico's First Judicial District showing Santa Fe, Rio Arriba, and Los Alamos Counties
Our District

Three Counties.
More Than 216,000 New Mexicans.

District Attorney Mary Carmack-Altwies and the First Judicial District Attorney’s Office serve communities throughout Santa Fe, Rio Arriba, and Los Alamos Counties.

216,146
Residents Across the First Judicial District
156,907
Santa Fe County
39,832
Rio Arriba County
19,407
Los Alamos County
Population estimates: U.S. Census Bureau, July 1, 2025 estimates.

Contact Our Office

Our three offices serve communities throughout the First Judicial District.

Santa Fe Headquarters

327 Sandoval Street
Santa Fe, NM 87501
(505) 827-5000 Get Directions

Rio Arriba Office

1122 Industrial Park Rd
Española, NM 87532
(505) 753-7131 Get Directions

Los Alamos Office

2500 Trinity Dr, STE D
Los Alamos, NM 87544
(505) 663-1930 Get Directions
News & Media

Media Inquiries

Members of the media can visit our News & Media page for media inquiries and communications.

Media Inquiries

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