Common Errors - Youth

youth

noun

BAD: There'll be a lot of youths at the party and so you should be able to enjoy yourself.

GOOD: There'll be a lot of young people at the party and so you should be able to enjoy yourself.

BAD: Life in a city is more interesting for the youth because there are more things to do.

GOOD: Life in a city is more interesting for young people because there are more things to do.

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Youth  (countable) is used, often in a disapproving way, to refer to a boy/young man between the ages of about fifteen and twenty: 'He was attacked and robbed by a gang of youths.' 

Youth  (uncountable) is used mainly in formal styles to refer to all young people considered as a group in society: 'The youth of industrialized nations need to be made aware of global problems.'

The usual phrase for 'people between the ages of about fifteen and twenty' is young people : 'These holidays are designed for young people like yourselves.'