Residents of the Las Vegas Valley area often do not make a distinction between the Clark County and the city of Las Vegas, using Las Vegas to describe both. It is also a major tourist destination, with 150,000 hotel and motel rooms.
According to the U.S. Census Bureau, the county has a total area of 8,091 square miles (20,955 km²). Land covers 7,910 square miles (20,488 km²) and 180 square miles (467 km²) of it (2.23%) is water.
The Colorado River forms the county's southeastern boundary, with Hoover Dam forming Lake Mead along much of its length. Las Vegas is frequently, yet incorrectly labeled a valley. By definition, Greater Las Vegas is a land basin or bowl, surrounded by four mountain ranges, with nearby Mount Charleston being the highest elevation at 11,918 ft, located to the northwest. Other than the forests on Mount Charleston, the geography in Clark County is a desert. Creosote bushes are the main native vegetation, and the mountains are mostly rocky with little vegetation.
In 2000 there were 512,253 households out of which 31.70% had children under the age of 18 living with them, 48.70% were married couples living together, 11.80% had a female householder with no husband present, and 33.70% were non-families. 24.50% of all households were made up of individuals and 6.70% had someone living alone who was 65 years of age or older. The average household size was 2.65 and the average family size was 3.17.
In the county the population was spread out with 25.60% under the age of 18, 9.20% from 18 to 24, 32.20% from 25 to 44, 22.30% from 45 to 64, and 10.70% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 103.50 males. For every 100 females age 18 and over, there were 102.80 males.
The median income for a household in the county was $53,536, and the median income for a family was $59,485. Males had a median income of $35,243 versus $27,077 for females. The per capita income for the county was $21,785. About 7.90% of families and 10.80% of the population were below the poverty line, including 14.10% of those under age 18 and 7.30% of those age 65 or over.
| Year | Democrat | Republican |
|---|---|---|
| 2004 | 51.72% 281,767 | 46.81% 255,337 |
| 2000 | 51.31% 196,100 | 44.72% 170,932 |
| 1996 | 48.71% 127,963 | 39.37% 103,431 |
| 1992 | 41.15% 124,586 | 32.17% 97,403 |
| 1988 | 40.86% 78,359 | 56.37% 108,110 |
| 1984 | 35.50% 53,386 | 62.60% 94,133 |
| 1980 | 30.07% 38,313 | 59.80% 76,194 |
| 1976 | 49.78% 51,178 | 46.92% 48,236 |
| '''1972 | 40.94% 36,807 | 59.06% 53,101 |
Clark County Government is run by the Clark County Commission which consists of 7 members who are elected to serve staggered 4 year terms in biannual partisan elections; the elections are only formally "non-partisan", as both sitting commissioners, as well as candidates' party affiliations, are routinely identified by Nevada citizens and local media. An indication of the power of the Commission is expressed in an axiom of Nevada politics: there are "only eight political offices that matter: the seven commissioners of Clark County and Nevada's governor.
After each election, the members elect a chairman who runs the Commission Meetings. Actual day to day operations are handled by the County Manager who is hired by the Commission. Its unincorporated townships also have appointed boards that provide advice to the Clark County Commission.
The County operates out of the Clark County Government Center located in the City of Las Vegas. The building is unusual in shape, and includes an outdoor amphitheater where concerts and other events are held.
The Las Vegas Metropolitan Police Department provides most law enforcement services in the county, including operation of the county's central jail, officially named the Clark County Nevada Detention Center, usually called CCDC for short. The present department was created in 1976 when the County Sheriff's Department merged with the Las Vegas Police Department.
Other entities that have their own police forces including, University of Nevada, Las Vegas, the Clark County School District, and cities such as Henderson, Mesquite, Boulder City and North Las Vegas. The Clark County Park Police is responsible for all of the parks operated by the county and some selected special venues, such as the Clark County Amphitheater, Clark County Archery Range, and the Desert Rose Golf Course.
The Regional Justice Center replaced the Clark County Courthouse in 2005, and is located about 3 blocks from downtown Fremont Street, at 200 Lewis Avenue.
Since 1999 the group has added more the 15,000 plants to stabilize the wash's banks and restore and expand the wetlands surrounding the wash. As part of the effort to restore the wash to a more natural state, they have also removed more than 500,000 pounds of trash.
Clark County contains a diverse desert flora and fauna, including higher elevation mountain areas, the desert floor and the Colorado River/Lake Mead ecosystems. Variations in diurnal temperature as well as seasonal swings in temperature create demanding adaptation elements on the species of this county. Additional pressure has been placed on species survival by the rapid human population expansion, especially since 1970.
Correspondingly air quality levels prior to the 1960s were in a favorable range, but the proliferation of automobiles with the human population expansion created circumstances where some Federal Air Quality Standards began to be violated in the 1980s.
To plan for the wave of development forecast by 1980, Clark County embarked on a regional Environmental Impact Assessment funded by a Federal Section 208 program, with Sedway Cooke conducting the planning work and Earth Metrics performing environmental analysis. This endeavor projected future population growth, land use changes and environmental impacts.
To prevent the loss of federal funds due to unacceptable dust levels in the Las Vegas valley, in 2003 the Nevada Air Quality Management division (under direction of Clark County officials) created the massive "Don't Be a Dusthole" campaign. The campaign successfully raised awareness of dust pollution in the Las Vegas valley, quantifiably reducing pollutants and preserving ongoing federal funding.