As of the census of 2000, there were 166,179 people, 67,409 households, and 37,614 families residing in the city of Dayton. The population density was 1,150.3/km² (2,979.4/mi²). There were 77,321 housing units at an average density of 535.2/km² (1,386.3/mi²). The racial makeup of the city was 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 were Hispanic or Latino of any race.

Households
There were 67,409 households out of which 27.3% had children under the age of 18 living with them, 30.2% were married couples living together, 20.6% had a female householder with no husband present, and 44.2% were non-families. 36.8% of all households were made up of individuals and 11.3% had someone living alone who was 65 years of age or older. The average household size was 2.30 and the average family size was 3.04.

Age structure and gender ratio
The age structure of Dayton's population is:

* under 18 years: 25.1%
* 18 to 24 years: 14.2%
* 25 to 44 year: 29.0%
* 45 to 64 years: 19.6%
* 65 years of age or older: 12.0%

The median age is 32 years. For every 100 females there were 93.1 males, while For every 100 females age 18 and over, there were 89.6 males.


Income
The median income for a household in the city was $27,423, and the median income for a family was $34,978. Males had a median income of $30,816 versus $24,937 for females. The per capita income for the city was $15,547. About 18.2% of families and 23.0% of the population were below the poverty line, including 32.0% of those under age 18 and 15.3% of those age 65 or over.

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