This report provides a summary and analysis of national and state juvenile arrest data in the United States. In 1998, law enforcement agencies made an estimated 2.6 million arrests of persons under age 18. Federal Bureau of Investigations statistics indicate that juveniles account for 18% of all arrests, and 17% of all violent crime arrests in 1998. However, between 1994 and 1998, juvenile arrests for violent crimes fell 19%, compared with a 6% decline for adults. Nevertheless, the number of juvenile arrests for violent crimes was still 15% above the 1989 level. Juvenile arrests disproportionately involved minorities in 1998. Fifty-five percent of juvenile arrests for violent crimes involved white youth, and 42% involved black youth, although only about 15% of the juvenile population is black. Black youths were also, although to a lesser extent, overrepresented in juvenile property arrests. The decline in juvenile arrests is no cause for complacency, since juvenile crime is still far too prevalent. (Contains 19 graphs and 5 tables.) (SLD)