Affiliate disclosure: This page contains affiliate links. We may earn a commission if you use them, at no extra cost to you. Our editorial recommendations are independent of these relationships.
New Mexico County
Otero County, New Mexico
White Sands National Park and the Trinity nuclear test site - from White Sands National Park (the 275-square-mile field of gypsum sand dunes in the Tularosa Basin - the world's largest gypsum dunefield - whose brilliantly white surface, constantly shifting dunes, and otherworldly lunar landscape make it one of the most visually stunning national parks in America) to the Trinity Site (the location within the White Sands Missile Range in Otero County where the world's first nuclear weapon was detonated on July 16, 1945 - the Trinity test launched the nuclear age and remains one of the most consequential moments in human history - the site is open to visitors twice yearly).
Affiliate disclosure: This page contains affiliate links. We may earn a commission if you use them, at no extra cost to you. Our editorial recommendations are independent of these relationships.
What do you need to do?
Tell us your goal and we'll guide you step-by-step to the right office, forms, and official resources.
Office: Otero County Office of Emergency Services – 1101 New York Avenue, Alamogordo, NM 88310; Emergency Manager Matthew Clark, (575) 439-2612.
Sheriff: Otero County Sheriff’s Office – 3208 N White Sands Blvd, Alamogordo, NM 88310 | (575) 443-2935 | 24/7 non-emergency (575) 437-2210 | Toll-free (800) 874-3743 | Fax: (575) 443-2936; Sheriff David Black. Substations in Cloudcroft (fax 575-682-2042) and Chaparral (fax 575-824-6653). Covers 6,627 square miles and 56 border miles.
Notes: For an active emergency, call 911.
Roads & Utilities
ROADS & TRANSPORTATION
Roads: US-54 and US-70 serve Alamogordo, the county seat, in southern New Mexico at the base of the Sacramento Mountains.
Notes: Otero County’s seat, Alamogordo, was founded in 1898 by John A. and Charles B. Eddy and incorporated 1912; the name is Spanish for “fat cottonwood,” after the area’s large cottonwood trees.
Business & Permits
BUILDING & PERMITS
Office: Otero County – confirm current phone via co.otero.nm.us.
Notes: Otero County is genuinely, historically extraordinary: it’s home to the Trinity Site, where the world’s first atomic bomb detonation occurred on July 16, 1945 (5:29 AM), marking the dawn of the nuclear age. The site, on White Sands Missile Range, is closed to the public except for a rare open house on the first Saturday of April and third Saturday of October. The county is also home to most of White Sands National Park – the largest gypsum sand dune field on Earth (275 square miles, dunes up to 60 feet tall), designated a national monument in 1933 and elevated to national park status in December 2019. Holloman Air Force Base, built during WWII, remains a major aerospace research facility.
Veterans Services
VETERANS SERVICES
Office: Otero County Veterans Service – confirm current contact via co.otero.nm.us.
Federal: Albuquerque VA Medical Center (long distance).
Libraries
LIBRARIES
Confirm current library address/hours via co.otero.nm.us or the City of Alamogordo.
Parks & Recreation
PARKS & RECREATION
Key Assets: White Sands National Park, the Trinity Site, Lincoln National Forest, and the International Space Hall of Fame (New Mexico Museum of Space History) are the county’s premier attractions.
Notes: The genuine Trinity Site atomic-bomb history and White Sands National Park are among the most globally significant local facts covered anywhere in this project.
GIS & Maps
GIS & MAPS
Appraisal/Parcel Search: Otero County Assessor – confirm current contact via co.otero.nm.us.
Animal Services
ANIMAL SERVICES
Otero County Animal Shelter – 601 Wright Ave, Alamogordo, NM 88310; confirm current phone via co.otero.nm.us/355/Animal-Shelter.
Environmental & Waste
ENVIRONMENTAL / WASTE MANAGEMENT
Office: Otero County – confirm current contact via co.otero.nm.us.
NOTES: Otero County is the sixth county in the New Mexico v3 A+ sourced redo’s third batch (Lincoln, Los Alamos, Luna, McKinley, Mora, Otero, Quay). The genuine Trinity Site – birthplace of the atomic age – and White Sands National Park are among the most globally significant local facts covered anywhere in this project. All contact information above was sourced via web search as of early August 2026 and should be reconfirmed directly with the relevant office before a visit, deadline-sensitive filing, or emergency-adjacent decision.
About Otero County
Otero County is where the nuclear age began – the Trinity Site within White Sands Missile Range is where humanity’s first nuclear weapon was detonated on July 16, 1945, and White Sands National Park’s 275-square-mile gypsum dunefield is one of the most visually extraordinary landscapes in America.
Alamogordo (the county seat, population ~31,000) is anchored by Holloman Air Force Base and White Sands – the stealth fighter testing and missile range operations define the regional economy alongside the national park tourism.
All Services
Browse every category and topic available for this county.
Otero County Assessor at 1104 N. White Sands Blvd., Suite B, Alamogordo, NM 88310, phone 575-437-2030. NM assessed at one-third of market value.
Courts & Legal
Otero County District Court at 1000 New York Avenue, Room 209, Alamogordo, NM 88310, phone 575-437-7310, handles probate.
Marriage & Vital Records
Marriage licenses, divorce records, and birth & death certificates are handled by the following office(s):
COUNTY CLERK
1000 New York Ave., Alamogordo, NM 88310
(575) 437-4942
COUNTY CLERK — ELECTIONS
1000 New York Ave., Alamogordo, NM 88310
(575) 437-4942
Genealogy
PRIMARY STATEWIDE RESEARCH CENTERS (same across all New Mexico counties)
New Mexico State Records Center and Archives, 1205 Camino Carlos Rey, Santa Fe, NM 87507.
New Mexico Genealogical Society, P.O. Box 8283, Albuquerque, NM 87198.
County-level record sources
Otero County Probate Court, Alamogordo (probate case files – see Probate section above).
Local societies
No dedicated Otero County genealogical society was confirmed in available directories.
Probate & Estate
Losing someone and having to deal with courts and paperwork at the same time is hard. This section won’t make that easier, but it should tell you what to expect, what it costs, and where to go – so at least you’re not walking in blind.
Where to go
Otero County Probate Court 1104 North White Sands Boulevard, Suite C, Alamogordo, NM 88310 (575) 437-4942 Otero County is in south-central New Mexico, seated in Alamogordo.
Step 1: figure out which path applies
New Mexico adopted the Uniform Probate Code. New Mexico has a dual court system: the county PROBATE COURT handles informal, uncontested probate matters with minimal court involvement, and has concurrent jurisdiction with the DISTRICT COURT over informal proceedings. The District Court alone handles formal probate – contested cases, determinations of heirship, and trust matters.
Small Estate Affidavit / Affidavit of Successor in Interest (N.M. Stat. § 45-3-1201) – available when the value of the entire estate (after liens and encumbrances) does not exceed $50,000 and does NOT include any real property. At least 30 days must have passed since death. This skips probate court entirely – the affidavit is presented directly to banks, the DMV, or other institutions holding the property.
Homestead Transfer Affidavit for Surviving Spouse (N.M. Stat. § 45-3-1205) – available 6 months after death, when the surviving spouse and decedent owned a homestead as community property valued at $500,000 or less (for property tax purposes). The affidavit is recorded with the county clerk and can avoid formal probate for the residence, but only if funeral expenses, expenses of last illness, and all unsecured debts have already been paid.
Informal Probate – the most common path for uncontested estates, filed with either the Probate Court or the District Court in the county where the decedent was domiciled. No hearing required.
Formal Probate – required for contested cases, disputes over heirship, or trust matters. Only the District Court can hear these.
Step 2: filing for informal or formal probate
File a petition with the Probate Court or District Court in the county where the decedent was domiciled. A probate may be started up to 3 years after death.
The court appoints the personal representative and issues Letters Testamentary or Letters of Administration.
The personal representative notifies creditors; New Mexico’s creditor claim period is 2 months from notice to creditors – one of the shortest in the country.
The personal representative inventories the estate’s assets, pays debts and expenses, and distributes the remaining assets according to the will or New Mexico’s intestacy statute.
The estate is closed, typically within 6 to 12 months for straightforward, uncontested cases.
What it costs
The filing fee for probate in Probate Court is generally around $30 – notably lower than in most states. District Court filing fees run higher, commonly $100–$232 depending on the county and complexity.
New Mexico does not set a fixed statutory percentage for personal representative compensation; courts typically look to a reasonable guideline of about 2–4% of the estate’s value.
New Mexico has no state estate tax and no state inheritance tax. Only the federal estate tax could apply, and only to very large estates.
Probate filings, estate administration, and guardianship matters are handled by the following office(s):
Public Safety & Arrests
Arrest records, inmate search, and law enforcement services are handled by the following office(s):
SHERIFF
1000 New York Ave., Alamogordo, NM 88310
(575) 437-8830
Elections & Voting
Voter registration, polling locations, and elections information are handled by the following office(s):
COUNTY CLERK — ELECTIONS
1000 New York Ave., Alamogordo, NM 88310
(575) 437-4942
ELECTIONS
1000 New York Ave., Alamogordo, NM 88310
(575) 437-4942
Health & Human Services
Offices & Contacts
Health services, social services, and assistance programs are handled by the following office(s):
NM HSD — Otero
(575) 437-9423
Gerald Champion Regional Medical Center
gcrmc.org (Alamogordo — quality regional hospital; major south-central NM anchor)
Public Health Information
PUBLIC HEALTH
Office: Otero County Public Health – confirm current contact via co.otero.nm.us.
Editorial independence: CountyOffices maintains strict editorial independence from our affiliate partners. Our content is researched from official government sources. Affiliate relationships do not influence our recommendations or the information we publish.
