No, not in most jobs. While as a child, you will not be allowed to work in a traditional job such as a store clerk, there are plenty of ways to work and generate a few extra bucks.
State laws only allow fourteen-year-olds to work n specific capabilities: as newspaper carriers, as assistants on farms, as seasonal helpers, i.e. landscaping, or as vendors. There is no legal hiring age for those whose parents own a farm. To work on another farm not owned by a parent or legal guardian, applicants must be at least 12 or 13 and need parental consent in writing. In some states, children 9 and older could deliver newspapers with a special badge obtained by a parent.
10 and 11-year-olds can obtain seasonal work in certain fields. The allowable age to work as a vendor or sell miscellaneous items remains at twelve. All jobs employing youths under the age of 18 would require work permits available through the state governments.