According to the Office for National Statistics, at the time of the United Kingdom Census 2001, Wigan had a population of 81,203. The 2001 population density was , with a 100 to 95.7 female-to-male ratio. Of those over 16 years old, 28.9% were single (never married) and 45.0% married. Wigan's 34,069 households included 29.7% one-person, 38.9% married couples living together, 8.5% were co-habiting couples, and 10.8% single parents with their children. Of those aged 16–74, 38.5% had no academic qualifications, a figure significantly higher than the average for the borough as a whole and England.