What is the earliest recorded joke in a published work in the English language?
Apparently, the oldest recorded joke in any form of English is about 1,000 years old, and is found in the Exeter Codex, written in Old English.
See the article in Wikipedia about the Codex Exoniensis.
The jokes in question are riddles in the form of double-entendres.
The joke itself is not much about the English Language & its Usage.
I am yet to convince myself of its source, authenticity and vintage, though.