Working age is the range of ages at which people are typically engaged in either paid or unpaid work. It typically sits between the ages of adolescence and retirement.

In most countries there is a minimum age at which people can legally work.

Child labour refers to the exploitation of children through any form of work that deprives children of their childhood, interferes with their ability to attend regular school, and is mentally, physically, socially and morally harmful. Such exploitation is prohibited by legislation worldwide, although these laws do not consider all work by children as child labour; exceptions include work by child artists, family duties, supervised training, and some forms of child work practiced by Amish children, as well as by indigenous children in the Americas.Child labour has existed to varying extents throughout history. During the 19th and early 20th centuries, many children aged 5–14 from poorer families worked in Western nations and their colonies alike. These children mainly worked in agriculture, home-based assembly operations, factories, mining, and services such as news boys – some worked night shifts lasting 12 hours. With the rise of household income, availability of schools and passage of child labour laws, the incidence rates of child labour fell.In the world's poorest countries, around one in four children are engaged in child labour, the highest number of whom (29 percent) live in sub-saharan Africa. In 2017, four African nations (Mali, Benin, Chad and Guinea-Bissau) witnessed over 50 percent of children aged 5–14 working. Worldwide agriculture is the largest employer of child labour. The vast majority of child labour is found in rural settings and informal urban economies; children are predominantly employed by their parents, rather than factories. Poverty and lack of schools are considered the primary cause of child labour.Globally the incidence of child labour decreased from 25% to 10% between 1960 and 2003, according to the World Bank. Nevertheless, the total number of child labourers remains high, with UNICEF and ILO acknowledging an estimated 168 million children aged 5–17 worldwide were involved in child labour in 2013.