As of the census of 2000, there were 808 people, 362 households, and 205 families residing in the city, the population density was 894.4 people per square mile (346.6/km²).
There were 441 housing units at an average density of 488.1 per square mile (189.2/km²).
For every 100 females age 18 and over, there were 86.6 males.
The Mott/Regent Wildfire won the 2007 North Dakota High School Nine Man Football championship, defeating the Napoleon-Gackle-Streeter Imperials.
The average household size was 2.12 and the average family size was 2.75. 20.4% of residents were under the age of 18; 3.6% were between the ages of 18 and 24; 15% were from 25 to 44; 27% were from 45 to 64; and 34% were 65 years of age or older.
The gender makeup of the city was 47.2% male and 52.8% female.
Donald Hagler, 82, of Hazen, died Thursday, January 18, 2018, at St. Services will be held at AM CST, Tuesday, January 23, 2018, at Salem United Methodist Church, Hazen with Pastor Kayla Buckley officiating.
Burial will follow at PM CST, at the North Dakota Veterans Cemetery, rural Mandan, ND.