The area around Dover was ideal for cattle grazing, By 1884, all the land had been leased to cattlemen. The Red Fork Traders' Ranch had been established near the Chisholm Trail. The land was opened for settlement by the Land Run of 1889, and the trading post was well-placed to benefit from the farmers that settled nearby.
The Rock Island built a track through the Traders' Ranch and constructed abridge across the Canadian in October, 1889. A settlement called Red Wing grew up around the ranch. In 1890, a post office designated "Dover" was established, and the community took that name. By 1893, the community had an estimated 150 residents. The population grew to about 500 by1910.
On September 18, 1906, a bridge across the Cimarron River near Dover collapsed beneath aRock Island train bound for Fort Worth, Texas from Chicago. The bridge was a temporary structure unable to withstand the pressure of debris and high water. Replacement with a permanent structure had been delayed by the railroad for financial reasons. Several sources report that over 100 persons were killed, although this figure is disputed. The true number may be as low as 4.
A tornado in May 1999, destroyed about one-third of the town, killing one.
Dover is located at (35.981598, -97.911047).It is 9 miles (14 km) north of Kingfisher.
According to the United States Census Bureau, the town has a total area of 0.3 square miles (0.78 km2), all of it land.
As of the census of 2000, there were 367 people, 138 households, and 98 families residing in the town. The population density was 1,187.5 people per square mile (457.1/km²). There were 151 housing units at an average density of 488.6 per square mile (188.1/km²). The racial makeup of the town was 84.74% White, 2.18% African American, 1.91% Native American, 6.54% from other races, and 4.63% from two or more races. Hispanic or Latino of any race were 14.99% of the population.
There were 138 households out of which 42.0% had children under the age of 18 living with them, 53.6% were married couples living together, 9.4% had a female householder with no husband present, and 28.3% were non-families. 26.1% of all households were made up of individuals and 13.0% 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 3.22.
In the town the population was spread out with 31.6% under the age of 18, 8.7% from 18 to 24, 30.0% from 25 to 44, 19.3% from 45 to 64, and 10.4% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 93.2 males. For every 100 females age 18 and over, there were 94.6 males.
The median income for a household in the town was $34,219, and the median income for a family was $36,563. Males had a median income of $24,583 versus $18,636 for females. The per capita income for the town was $17,287. About 11.0% of families and 15.1% of the population were below the poverty line, including 17.8% of those under age 18 and 6.1% of those age 65 or over.