Albert, Count of Nassau-Weilburg

Albert of Nassau-Weilburg-Ottweiler (26 December 1537, Weilburg – 11 November 1593, Ottweiler), was a count of the House of Nassau.

Albert was the only son of Philip III of Nassau-Weilburg and his second wife, Countess Anna of Mansfeld.

Albert inherited part of the county of Nassau-Weilburg jointly with his younger half-brother, Philip IV.

Albert and Philip concluded several treaties with Hesse, in which they gradually divided their shared possessions.

He often travelled to the Imperial Diet and to the Emperor Maximilian II as a representative of the Wetterau Association, to discuss freedom of religion for the Calvinist princes.

When Count John III of Nassau-Saarbrücken died in 1574 without a male heir, the Counties of Saarbrücken, Saarwerden and Ottweiler passed to Albert and Philip.

As the eldest member of the Walram line of the House of Nassau, Albert took up guardianship of John Louis of Nassau-Wiesbaden.

Elector Palatine Frederick III also claimed some of the Nassau territories; Albert was able to settle this issue out of court.

At the request of Charsisius, some Catholic customs, such a celebrating carnival and lighting a bonfire on St. John's Eve were made punishable offenses in the Nassau-Weilburg territories.

Catholic priests were converted to the new faith or removed from office; monasteries were dissolved; church property was confiscated; schools were set up and jus patronatus was purchased.

Albert probably also initiated the expansion of Gleiberg Castle in the late 16th century, after it had fallen entirely to the House of Nassau.