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Arizona
State of Arizona
Location of Arizona in the United States
Location of Arizona in the United States
Websiteaz.gov

Arizona is a landlocked state in the Southwestern United States, sharing the Four Corners region with Colorado, New Mexico, and Utah. It also borders Nevada to the northwest and California to the west, and shares an international border with the Mexican states of Sonora and Baja California to the south and southwest. Its capital and largest city is Phoenix, which is the most populous state capital and fifth-most populous city in the United States. Arizona is divided into 15 counties.

Arizona is the sixth-largest state by area and the 14th-most-populous of the 50 states. It is the 48th state and last of the contiguous states to be admitted to the Union, achieving statehood on February 14, 1912. Historically part of the territory of Alta California and Nuevo México in New Spain (Spanish Empire), it became part of independent Mexico in 1821. After being defeated in the Mexican–American War, Mexico ceded much of this territory to the United States in 1848, where the area became part of the New Mexico Territory. The southernmost portion of the state was acquired in 1853 through the Gadsden Purchase.

Southern Arizona is known for its desert climate, with extremely hot summers and mild winters. Northern Arizona features forests of pine, Douglas fir, and spruce trees; the Colorado Plateau; mountain ranges (such as the San Francisco Mountains); as well as large, deep canyons, with much more moderate summer temperatures and significant winter snowfalls. There are ski resorts in the areas of Flagstaff, Sunrise, and Tucson. In addition to the internationally known Grand Canyon National Park, which is one of the world's seven natural wonders, there are several national forests, national parks, and national monuments.

Arizona is home to a diverse population. About one-quarter of the state is made up of Indian reservations that serve as the home of 27 federally recognized Native American tribes, including the Navajo Nation, the largest in the state and the country, with more than 300,000 citizens. Since the 1980s, the proportion of Hispanics has grown significantly owing to migration from Mexico and Central America. A substantial portion of the population are followers of the Roman Catholic Church and the Church of Jesus Christ of Latter-day Saints. Arizona's population and economy have grown dramatically since the 1950s because of inward migration, and the state is now a major hub of the Sun Belt. Many large companies, such as PetSmart and Circle K, have headquarters in the state, and Arizona is home to major universities, including the University of Arizona, Arizona State University, and Northern Arizona University. (Full article...)

1898 map of the Arizona Territory

The history of Arizona encompasses the Paleo-Indian, Archaic, Post-Archaic, Spanish, Mexican, and American periods. About 10,000 to 12,000 years ago, Paleo-Indians settled in what is now Arizona. A few thousand years ago, the Ancestral Puebloan, the Hohokam, the Mogollon and the Sinagua cultures inhabited the state. However, all of these civilizations mysteriously disappeared from the region in the 15th and 16th centuries. Today, countless ancient ruins can be found in Arizona. Arizona was part of the state of Sonora, Mexico from 1822, but the settled population was small. In 1848, under the terms of the Mexican Cession the United States took possession of Arizona north of the Gila River. It became part of the Territory of New Mexico. In 1854 the United States purchased the part of the Arizona south of the Gila River, which later allowed a rail connection from Yuma to El Paso.

In 1863, Arizona was split off from the Territory of New Mexico to form the Arizona Territory. The remoteness of the region ended with the arrival of railroads in 1880. Arizona became a state in 1912. It was primarily rural with an economy based on cattle, cotton, citrus, and copper. Dramatic growth came after 1945, as retirees and young families who appreciated the warm weather and low costs emigrated from the Northeast and Midwest. By the 1990s many new arrivals came, increasing the population dramatically, particularly in the metropolitan Phoenix area. (Full article...)

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Havasu Falls
Havasu Falls
Credit: Moondigger

Havasu Falls, one of the four waterfalls of the Havasupai Indian Reservation, is located near the village of Supai, Arizona. It is the second of four falls on Havasu Creek, which empties into the Grand Canyon on the Colorado River. The water of Havasu Creek has a bluish green tint due to the heavy lime content of the water. The fall is forked and looks like two falls when the river is flowing heavily.

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Did you know?
  • ...that the location of the Silver King Mine was first discovered by a soldier building a road during the Apache Wars, who found black rocks that flattened when struck?

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You are invited to participate in WikiProject Arizona, a WikiProject dedicated to developing and improving articles about Arizona.
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Rose Mofford (née Perica; June 10, 1922  September 15, 2016) was an American civil servant and politician of the Democratic Party who served as the 18th governor of Arizona from 1988 to 1991. Her career in state government spanned 51 years, beginning as a secretary and working her way up the ranks to become the state's first female secretary of state, serving from 1977 to 1988, and the state's first female governor. (Full article...)

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The following are images from various Arizona-related articles on Wikipedia.

Arizona news

June 4, 2026 – Attempts to overturn the 2020 United States presidential election
The office of Arizona attorney general Kris Mayes says that it will seek new indictments against fake electors involved in attempting to overturn the 2020 U.S. presidential election in the state following a denial of an appeal by Mayes that would require prosecutors to send the case back to the grand jury. (AP via The Guardian) (The Hill)
June 3, 2026 –
The U.S. state of Arizona reports its first death of the Sin Nombre strain of hantavirus pulmonary syndrome. (Forbes)

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