List of family members by age group

Those in bold indicate the parents. Those in italics indicate aggressive behaviors.

Season 8 (2011-2012)
Season eight only had eleven episodes, but Jo helped mostly families that were ginormous.

The most common age this season was 3. Jo helped families with a total of fourteen 3-year olds, including three respective sets of twins, triplets, and quadruplets.

The most common ages of parents this season were 40 and 39. Mazar Family had two 40-year old parents, while Room Family had two 39-year old parents.

The youngest mother in history excludes Samantha from the George Family last season, and Kristin from the Langbroek Family this season. Her name is Nicole from the Birou Family, at age just 20.

In Supernanny Season 1 Special Update, various websites, and various games, her birthdate was recorded as June 24, 1991, making her 20 years, 120 days, when the episode aired on October 21, 2011. The episode was recorded in late September and the family was also helped in early September.

Trivia

 * The Langbroek Family, the Eriksonner Family, the Mazar Family, and the Room Family are the only families to have their surnames twice in the top 10 list.
 * In Season 8, no parents are aged 43. Closest to that is Sarah Eriksonner, born 44.
 * In Season 8, all the people were under the age of 53.