Otto II, Count of Waldeck

Otto II (before 1307–1369) was Count of Waldeck from 1344 until his death, having co-ruled with his father Henry IV since 1332. Around 1339 he married Matilda, daughter of Duke Otto III of Brunswick-Lüneburg.

In 1349 Emperor Charles IV enfeoffed him with Waldeck as an imperial county. When his father-in-law died without male heirs, Otto claimed Lüneburg, but the emperor awarded only a heavy indemnity that was never paid. He died in 1369 amid war with Mainz and Hesse.