The center of Blanchard is situated in Township 8 North, Range 4 West, Section 30 in northwestern McClain County.

Named after William G. "Bill" Blanchard,[6] the community was organized originally by the Canadian Valley Construction Company, which also planned to build a railroad.

The second sale was held on July 18, 1907, and final lots were sold on March 25, 1908, by the Blanchard Townsite Company.

Within a year the town was described as having forty business establishments, including a state and a national bank, four blacksmith shops, three livery barns, two grain elevators, and a weekly newspaper.

The petition praying for incorporation was favorably acted upon at the [federal] courts at Chickasha [sic] last week.

When Arthur H. "Art" and Bill Blanchard moved their store from Womack to the new townsite in 1906, they took the post office with them.

In 1909, the Northern District Court was established whereby McClain County was divided into two sections for legal matters for the convenience of the citizens.

Oklahoma State Highway 76 heads north out of town on Main Street, ending after 10 miles (16 km) in the northern part of Newcastle.

Blanchard consists of one square mile "core" of streets roughly laid out in a grid pattern, situated atop a gentle hill surrounded by newer development and agricultural areas within about a 4-mile (6 km) radius of the center.

Central Blanchard, located in McClain County, consists of homes (about half built before 1960), several churches and a historic Main Street downtown area.

Residents of Blanchard tend to view it as a small-town environment with character and charm, but the rapid growth in the area has brought change.

To keep the town from being swallowed by urban sprawl, a large annexation was effected in 2004 to provide Blanchard with a "buffer zone".

A Main Street beautification project is underway and infrastructure is being improved to handle the rise in population.

Softball won a state championship in 1984 and 2009, basketball, golf, cheerleading, powerlifting and wrestling.