Fresno is a city in California, USA, the county seat of Fresno County. As of July 1, 2007, Fresno had an estimated population of about 471,000, making it the fifth largest city in California and the 36th largest in the nation. As of February 27, 2009, the population was estimated at 500,017. Fresno is located in the center of the wide San Joaquin Valley of Central California, approximately 200 miles north of Los Angeles and 170 miles south of the state capital, Sacramento. The city is part of the Fresno-Clovis metropolitan area, which, with a population of 1,002,046, is the second largest metropolitan area in the Central Valley after Sacramento. The name Fresno is the Spanish language word for the ash tree and an ash leaf is featured on its flag. Fresno is located at 36° 44' 52"N 119° 46' 21"W (36.74778; -119.7725).

The United States Census Bureau reports Fresno as having a total area of 104.8 square miles with 99.58% land covering 104.4 square miles, and .42% water, 0.4 square miles.

The original inhabitants of the region were the Yokuts. The County of Fresno was formed in 1856. It was named for the abundant mountain ash trees lining the San Joaquin River. Fresno is the Spanish word for white ash trees. The county was much larger than it is today as part of Tulare County, comprising its current area plus all of what became Madera County and parts of what are now San Benito, Kings, Inyo, and Mono counties.

Millerton, then on the banks of the free-flowing San Joaquin River and close to Fort Miller, became the county seat after becoming a focal point for settlers. Other early county settlements included Firebaugh's Ferry, Scottsburg and Elkhorn Springs.

The San Joaquin River flooded on December 24, 1867, inundating Millerton. Some residents rebuilt, others moved. Flooding also destroyed the town of Scottsburg that winter. Rebuilt on higher ground, Scottsburg was renamed Centerville.

In 1867, Anthony Easterby purchased land bounded by the present Chestnut, Belmont, Clovis and California avenues. Unable to grow wheat for lack of water, he hired Moses J. Church in 1871 to build an irrigation canal. Church then formed the Fresno Canal and Irrigation Company, a predecessor of the Fresno Irrigation District.

In 1872, the Central Pacific Railroad established a station near Easterby's farm for its new Southern Pacific line. Soon there was a store. Around the station and the store grew the town of Fresno Station, later called Fresno. Many Millerton residents, drawn by the convenience of the railroad and worried about flooding, moved to the new community. Fresno became an incorporated city in 1885.

Two years after the station was established, county residents voted to move the county seat from Millerton to Fresno. When the Friant Dam was completed in 1944, the site of Millerton became inundated by the waters of Millerton Lake. In extreme droughts, when the reservoir shrinks, ruins of the original county seat can still be observed.

In the nineteenth century, with so much wooden construction and in the absence of sophisticated firefighting resources, fires often ravaged American frontier towns. The greatest of Fresno's early-day fires, in 1882, destroyed an entire block of the city. Another devastating blaze struck in 1883.

The population of Fresno proper soared in the second half of the 20th century. It entered the ranks of the 100 largest United States cities in 1960 census with a population of 134,000. In the 1990 census it moved up to 47th place with 354,000, and in the census of 2000 it achieved 37th place with 428,000, a 21 percent increase during the preceding decade.

The Fresno Municipal Sanitary Landfill was the first modern landfill in the United States, and incorporated several important innovations to waste disposal, including trenching, compacting, and the daily covering of trash with dirt. It was opened in 1937 and closed in 1987. Today, it has the unusual distinction of being a National Historic Landmark as well as a Superfund Site.

Before World War II, Fresno had many ethnic neighborhoods, including Little Armenia, German Town, Little Italy, and China Town. During 1942, Pinedale, in what is now North Fresno, was the site of the Pinedale Assembly Center, an interim facility for the relocation of Fresno area Japanese Americans to internment camps. The Fresno Fairgrounds was also utilized as an assembly center.

Row crops and orchards gave way to urban development particularly in the period after World War II; this transition was particularly vividly demonstrated in locations such as the Blackstone Avenue corridor.

The dance style commonly known as popping evolved in Fresno in the 1970s.

Fictional residents of the town were portrayed in a 1986 comedic mini series titled "Fresno," featuring Carol Burnett, Dabney Coleman, Teri Garr and Charles Grodin, along with numerous other celebrities. The mini series was presented as a parody of the prime time soap operas popular in the 1980s.

In 1995, the FBI's Operation Rezone sting resulted in several prominent Fresno and Clovis politicians being charged in connection with taking bribes in return for rezoning farmland for housing developments. Before the sting brought a halt to it, housing developers could buy farmland cheaply, pay off council members to have it rezoned, and make a large profit building and selling inexpensive housing. Sixteen people were eventually convicted as a result of the sting.