《乡愁》是诗人余光中漂泊异乡，游弋于海外回归中国后所作的一首现代诗。诗歌表达对故乡，对祖国恋恋不舍的一份情怀。诗歌中更体现了诗人余光中期待中华民族早日统一的美好愿望。
2015年中央电视台春节联欢晚会上，雷佳演唱了由诗歌改编的歌曲《乡愁》。
原文
小时候，
乡愁是一枚小小的邮票，
我在这头，
母亲在那头。 长大后，
乡愁是一张窄窄的船票，
我在这头，
新娘在那头。
后来啊，
乡愁是一方矮矮的坟墓，
我在外头，
母亲在里头。
而现在，
乡愁是一湾浅浅的海峡，
我在这头，
大陆在那头。
英文译文
When I was young,
my homesickness was a small stamp,
I was here,
my mother was there.
After growing up,
my homesickness was a narrow ticket,
I was here,
my bride was there.
Later,
my homesickness was a little tomb,
I was outside,
my mother was inside.
And now,
my homesickness is a shallow strait,
I am here,
the mainland is there.