Agnes Wilhelmine von Wuthenau, Countess of Warmsdorf (4 December 1700 - 14 January 1725) was a German noblewoman and the first wife of Augustus Louis, Prince of Anhalt-Köthen.^[1]

Agnes Wilhelmine was born on 4 December 1700 in Plötzkau into an ancient noble family, as the eldest daughter of Christian Ludwig von Wuthenau and his wife, Agnes Sabine von Schlegel. She served as a lady-in-waiting to Gisela Agnes of Anhalt-Köthen, who ruled as regent of Anhalt-Köthen. She became engaged to Gisela Agnes's son, Prince Augustus Louis of Anhalt-Köthen, on 18 November 1721. She was created Countess of Warmsdorf by Charles VI, Holy Roman Emperor.^[2] Agnes and Augustus Louis married on 23 January 1722 in Dresden.^[3] As the marriage was considered morganatic, she did not obtain the title and style of princess.^[4] They had two children, who were recognized as princesses of Anhalt:

• Gisela Henriette (b. Warmsdorf, 16 December 1722 - d. Warmsdorf, 16 December 1728).
• Agnes Leopoldine (b. Köthen, 31 May 1724 - d. Köthen, 28 July 1766).

Agnes died on 14 January 1725, three years before her husband succeeded his brother as the ruling Prince of Anhalt-Köthen. After her death, August Ludwig married Countess Christine Johanna Emilie von Promnitz and later his own sister-in-law, Countess Anna Friederike von Promnitz and had issue from all his marriages.