The Miami Valley is the land area surrounding the Great Miami River in southwest Ohio, USA, and includes the Little Miami, Mad, and Stillwater rivers as well. Geographically, it includes Dayton, Springfield, Middletown, Hamilton, and other communities. The name is derived from the Miami Indians.
Commonly, however, it refers to the economic and cultural-social region centered on the Greater Dayton area. Middletown and Hamilton both fall under the economic and cultural-social influence of Cincinnati and thus are not commonly included in this sense. Institutions and enterprises in the Dayton area, such as Miami Valley Career Technology Center, Miami Valley Hospital, Miami Valley Council of the Boy Scouts of America and Miami Valley Storytellers illustrate local usage.
During the mid-twentieth century, among the largest employers in the Valley were Procter and Gamble in Cincinnati, Champion Paper and Fiber in Hamilton, Armco in Middletown, and National Cash Register in Dayton.
Local television stations WDTN, ThinkTV (WPTD and WPTO), WHIO-TV, WKEF and WRGT include the following counties and cities in the cultural Miami Valley: