This study analyzed data from the National Survey of America's Families to determine the effects of particular child, parent, and family factors on serious emotional and behavioral problems of children. The results were tabulated in the form of odds ratios that depict the likelihood or degree of risk of each factor. The factors were also examined relative to the emotional well-being of children in the state of Washington. Findings included the following: (1) in Washington, 1 in 18 children (about 30,300 6- to 11-year-olds) and 1 in 15 adolescents (about 34,500 12- to 17-year-olds) exhibit serious behavioral or emotional problems; (2) boys are more likely than girls to exhibit serious emotional or behavioral problems; (3) children from lower- income families are more likely to exhibit serious emotional or behavioral problems than children from families with adequate income; (4) young children whose parents are unemployed are more likely to exhibit serious emotional or behavioral problems than those whose parents are employed; (5) adolescents living with less well-educated parents are at greater risk of serious emotional or behavioral problems; and (6) adolescents living with single parents are at greater risk of serious emotional or behavioral problems. (EV)