McClain County, Oklahoma

McClain County is a located in the  of. In 2007 the county population was estimated at 37,038. Its, business and employment center is. The county's largest city is.

McClain County is part of the Metropolitan Statistical Area, and is in the top 3 fastest growing counties in Oklahoma with a growth rate of 21.5%

McClain County is named for Charles M. McClain, an Oklahoma constitutional convention attendee.

Geography
According to the, the county, roughly triangular in shape, has a total area of 1,503 (580 ). 1,475 km² (570 sq mi) of it is land and 27 km² (10 sq mi) of it (1.80%) is water.

Major highways
The busiest highway in the county is, which enters the county on the north at on the McCall Bridge. It then parallels the through the county seat,. It eventually turns southward and leaves the county at its border with.

Another important interstate highway is, which runs through the northwestern part of the county. The H.E. Bailey Turnpike Norman Spur connects this highway to the U.S. 62/U.S. 277/OK-9 intersection.

enters McClain County via the McCall bridge, duplexed with I-35, and immediately turns due west, running along the northern edge of Goldsby until its intersection with / south of. From this intersection the three highways, continue southwest towards and further on to  in.

County roads
Like many counties, McClain County contains an extensive network of county-maintained roads. They form a grid with parallel roads generally placed 1 mile apart.

To dispel confusion and assist the small cities introducing new systems, the county road system was recently renamed and signed throughout the county. East-west roads are numbered, with 100th St. located along the southern edge of the county, and the numbers gradually increasing toward the northern tip of the county. North-south streets are named, generally indicating the name of the road in the grid that the county road best aligns with. (e.g. Santa Fe Avenue would, if extended northward, eventually connect with the street of the same name in Oklahoma City.)

Adjacent counties

 * (north)
 * (northeast)
 * (east)
 * (south)
 * (west)

Demographics
As of the of 2000, there were 27,740 people, 10,331 households, and 8,037 families residing in the county. The was 19/km² (49/sq mi). There were 11,189 housing units at an average density of 8/km² (20/sq mi). The racial makeup of the county was 87.26%, 0.66% or , 5.61% , 0.22% , 0.03% , 2.24% from , and 3.98% from two or more races. 4.86% of the population were or  of any race.

There were 10,331 households out of which 36.00% had children under the age of 18 living with them, 65.30% were living together, 9.00% had a female householder with no husband present, and 22.20% were non-families. 19.40% of all households were made up of individuals and 8.40% had someone living alone who was 65 years of age or older. The average household size was 2.66 and the average family size was 3.04.

In the county, the population was spread out with 26.80% under the age of 18, 8.10% from 18 to 24, 29.00% from 25 to 44, 24.00% from 45 to 64, and 12.00% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 98.60 males. For every 100 females age 18 and over, there were 96.10 males.

The median income for a household in the county was $37,275, and the median income for a family was $42,487. Males had a median income of $31,062 versus $21,506 for females. The for the county was $18,158. About 8.30% of families and 10.50% of the population were below the, including 13.40% of those under age 18 and 8.80% of those age 65 or over.

NRHP sites
The following sites in McClain County are listed on the :
 * , Purcell
 * , Purcell
 * (/ Bridge over the ), Purcell/Lexington