According to an annual threat assessment report by the United States Drug Enforcement Administration, users of heroin in the country are starting at a younger age.
In 2009, the average age when a heroin abuser first started the drug was 25.5 years old. In 2010, it dropped to 21.4 years old, and settled at 22 years old in 2011.
In cities such as Minneapolis, Minnesota, 19.9 percent of people arrested who tested positive for heroin was under the age of 21. Between 2010 t0 2011, the number of heroin deaths in Minneapolis increased from 16 deaths to 46 deaths. Arrests for heroin trafficking has also increased.
In 2010, a estimated 142,000 people tried heroin for the first time in the United States. In 2011, the number of first time heroin users increased to 178,000. During the time period of 2002 to 2008, the average range of first time heroin users was between 91,000 to 118,000.
Source (PDF): “National Drug Threat Assessment Summary 2013,” U.S. Department of Justice, Drug Enforcement Administration, November 2013, page 6.