Who is the Book of Proverbs addressed to?

A:The Book of Proverbs is not really addressed to anyone in particular. It is partly about Lady Wisdom, the spirit/goddess who was revered by the Jews from the time of the Babylonian Exile until around the end of the first century CE and partly a compilation of wisdom sayings from various sources, including Egypt. So it was written for the Jews after the Return from Exile, and the Wisdom passages could be thought of as more particularly addressed to those who failed to heed her advice regarding righteous living.

Another Answer:

King Solomon, God's chosen representative to His people, wrote the Book of Proverbs (primarily his work written circa BC 970-930) with the purpose and theme found in Proverbs 1:1-7. This has his instruction to his people (then and all people afterwards) in wisdom, the preparation of life, and the ways of life in God's world.

Proverbs 1:7New International Version (NIV)

7 The fear of the LORD is the beginning of knowledge,

but fools despise wisdom and instruction.