Los Alamos County, website

Los Alamos County in New Mexico uses area codes 505 and 575. On this page, you will see the physical addresses and contact information of the most relevant government agencies in Los Alamos, including the Clerk’s Office, Sheriff’s Office, and the Health Department. 

Sheriff’s Office

2500 Trinity Drive
Los Alamos, New Mexico, 87544
Phone: (505) 662-8028
Fax: (505) 663-3501

Police Department

2500 Trinity Drive
Los Alamos, New Mexico, 87544
Phone: (505) 662-8222
Fax: (505) 662-8287

County Court

1319 Trinity Drive
Los Alamos, New Mexico, 87544
Phone: (505) 662-2727
Fax: (505) 661-6258

Municipal Court

2500 Trinity Drive
Los Alamos, New Mexico, 87544
Phone: (505) 662-8025
Fax: (505) 662-8365

County Clerk

1000 Central Avenue
Los Alamos, New Mexico, 87544
Phone: (505) 662-8010

Treasurer

P. O. Box 99
Los Alamos, New Mexico, 87544
Phone: (505) 662-8070

Tax Assessor-Collector

1000 Central Avenue
Los Alamos, New Mexico, 87544
Phone: (505) 662-8030
Fax: (505) 663-1764

Los Alamos County Jail

2500 Trinity Drive
Los Alamos, New Mexico, 87544
Phone: (505) 662-8028
Fax: (505) 662-8287

Emergency Management

1000 Central Avenue
Los Alamos, New Mexico, 87544
Phone: (505) 662-8283

Fire Department

195 East Road
Los Alamos, New Mexico, 87544
Phone: (505) 662-8305
Fax: (505) 662-8302

Health Department

1183 Diamond Drive
Los Alamos, New Mexico, 87544
Phone: (505) 662-4038

Human Services Department

1183 Diamond Drive, Ste. E
Los Alamos, New Mexico, 87544
Phone: (505) 591-9444