Dayton is a city in southwestern Ohio, United States with a population of 166,179 (2000). It is the county seat and largest city of Montgomery County. The Greater Dayton area or Dayton metropolitan area encompasses a number of contiguous communities outside Dayton city proper, including Vandalia, Trotwood, Kettering, Centerville and Beavercreek, with a population of 848,153 (2000). Dayton is situated within the Miami Valley region of Ohio, just north of the Cincinnati metropolitan area.
Dayton plays host to significant industrial, aerospace, and research activity and is known for the many technical innovations and inventions developed there. The city was the home of the Wright Brothers, poet Paul Laurence Dunbar, and entrepreneur John H. Patterson. Dayton is nicknamed the Gem City, and is also sometimes referred to as the "Birthplace of Aviation."
Dayton Sister Cities International supports efforts for business and cultural development in Augsburg, Germany; Oiso, Japan; Monrovia, Liberia; Holon, Israel and Sarajevo, Bosnia and Herzegovina.
Dayton is located at 39°45'46" North, 84°11'48" West (39.762708, -84.196665). The city sits in the Miami River Valley, north of Cincinnati, well south of Toledo, south-west of Columbus, and east of Richmond, Indiana, in the southwest quadrant of the state. Most official and government designations place it in west-central Ohio (a term which colloquially often refers to Lima, Ohio). It is at the confluence of the Great Miami River, the Stillwater and Mad rivers, and Wolf Creek. Area natives seldom use the phrase 'greater Dayton". They affectionately refer to the region as the Miami Valley, which is meant to mean all areas between the cities of Sidney and Middletown (north and south), and Springfield to the Indiana border (east west).
Following the flood of 1913, the Miami Conservancy District was established in 1914 to build dams and levees and to dredge and straighten channels to control flooding of the Miami and surrounding rivers.
According to the United States Census Bureau, the city has a total area of 146.7 km2 (56.6 mi2). 144.5 km2 (55.8 mi2) of it is land and 2.2 km2 (0.9 mi2) of it is water. The total area is 1.55% water.
As of the census of 2000, there are 166,179 people, 67,409 households, and 37,614 families residing in the city. The population density is 1,150.3/km2 (2,979.4/mi2). There are 77,321 housing units at an average density of 535.2/km2 (1,386.3/mi2). The racial makeup of the city is 53.40% White, 43.10%% Black or African American, 0.30% Native American, 0.65% Asian, 0.04% Pacific Islander, 0.70% from other races, and 1.83% from two or more races. 1.58% of the population are Hispanic or Latino of any race.