Hazleton is a city in Buchanan County, Iowa, United States. The population was 823 at the 2010 census. The original town was established in 1853 when E. W. Tenney opened a store. A post office opened soon after and was named "Hazelton", because the community was in a hazelnut grove. When the railway came, it missed the town by a mile, so the town was moved to the railway. The current site of "Hazleton" was established in 1873, and incorporated in 1883.
As of the census of 2010, there were 823 people, 354 households, and 207 families living in the city. The population density was. There were 402 housing units at an average density of. The racial makeup of the city was 96.8% White, 0.5% African American, 1.6% Native American, and 1.1% from two or more races. Hispanic or Latino of any race were 1.6% of the population. There were 354 households of which 28.5% had children under the age of 18 living with them, 42.1% were married couplesliving together, 10.5% had a female householder with no husband present, 5.9% had a male householder with no wife present, and 41.5% were non-families. 35.3% 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 2.32 and the average family size was 3.00. The median age in the city was 40.7 years. 24.5% of residents were under the age of 18; 8.3% were between the ages of 18 and 24; 24.4% were from 25 to 44; 29.2% were from 45 to 64; and 13.5% were 65 years of age or older. The gender makeup of the city was 53.9% male and 46.1% female.
2000 census
As of the census of 2000, there were 950 people, 381 households, and 252 families living in the city. The population density was 1,276.4 people per square mile. There were 409 housing units at an average density of 549.5 per square mile. The racial makeup of the city was 98.32% White, 0.95% Native American, 0.21% from other races, and 0.53% from two or more races. Hispanic or Latino of any race were 2.11% of the population. There were 381 households out of which 36.2% had children under the age of 18 living with them, 47.5% were married couples living together, 12.6% had a female householder with no husband present, and 33.6% were non-families. 26.5% 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 2.49 and the average family size was 3.03. 29.4% were under the age of 18, 8.5% from 18 to 24, 29.1% from 25 to 44, 21.7% from 45 to 64, and 11.4% were 65 years of age or older. The median age was 34 years. For every 100 females, there were 104.3 males. For every 100 females age 18 and over, there were 102.1 males. The median income for a household in the city was $32,625, and the median income for a family was $36,023. Males had a median income of $27,460 versus $21,625 for females. The per capita income for the city was $14,955. About 11.4% of families and 11.6% of the population were below the poverty line, including 14.0% of those under age 18 and 6.9% of those age 65 or over.