Unfortunately, the answer is yes. Depression is much more common in children and adolescents than once believed.
For reasons that are not well understood, there has been a trend toward
an earlier age at onset of depression (and manic-depression) in people
born since the 1940’s.
Watch For Signs
Although young children may not be able to express their sad mood in words, they often show it with persistent sad expressions. Other indications of depression
are loss of motivation and enthusiasm, fatigue, difficulty making
decisions, social withdrawal, weight change (up or down), irritability
and anger, deterioration of school performance, truancy, acting out and
behavioral difficulties, and physical complaints.
Seek Treatment As Early As Possible
Families or teachers may recognize behavioral changes indicative of depression even though the youngster may deny being depressed. Whenever
depression is suspected, the child should be evaluated by a doctor
experienced in working with this age group. Just as in adults, depression in young people can have a number of causes, and recognizing these causes can lead to very effective treatments. Recognizing and treating depression in youngsters
is especially important considering the critical stages of development
they are passing through. Also, there has been a disturbing
increase in suicide in adolescents over the last few decades, and
although suicide is quite rare in children, it does occur. Treatments for childhood and adolescent depression are the same as those used in adults and include psychotherapies and medications, and combinations of the two.

Can Children Suffer From Depression?
Also,
clinicians are doing a better job of looking for and recognizing
depression in these age groups. Quite often, depression in young
people consists of the same symptoms as found in adults. At
times, however, the diagnosis may be more elusive. The youngsters
may not recognize the discomfort that they are experiencing is an illness known as depression.