|Anna Sophie of Saxe-Gotha-Altenburg|
|Princess of Schwarzburg-Rudolstadt|
|Born||22 December 1670|
|Died||28 December 1728(aged 58)|
|Spouse||Louis Frederick I, Prince of Schwarzburg-Rudolstadt|
Princess Amalie Magdalene
Louis Günther II
|Father||Frederick I, Duke of Saxe-Gotha-Altenburg|
|Mother||Magdalena Sybille of Saxe-Weissenfels|
Duchess Anna Sophie of Saxe-Gotha-Altenburg (22 December 1670 – 28 December 1728) was a princess of Saxe-Gotha-Altenburg and Duchess in Saxony by birth, and by marriage a Princess of Schwarzburg-Rudolstadt.
Her father was a fourth-generation descendant of John Frederick, Elector of Saxony in direct male line. He was also a fourth-generation descendant of his wife Sybille of Cleves who was daughter of John III, Duke of Cleves and older sister of both Anne of Cleves and Wilhelm, Duke of Jülich-Cleves-Berg.
They were parents to John II, Duke of Saxe-Weimar (1570–1605). He married Dorothea Maria of Anhalt, a granddaughter of Christoph, Duke of Württemberg and great-granddaughter of Ulrich, Duke of Württemberg.
John and Dorothea Maria were parents to Ernst I, Duke of Saxe Coburg. He married his cousin Elisabeth Sophie of Saxe-Altenburg. As a result, their son Frederick I inherited both Duchies as the Duke of Saxe-Gotha-Altenburg in 1675.
She married Louis Frederick I, Prince of Schwarzburg-Rudolstadt (15 October 1667- 24 June 1718). They had the following children:
- Frederick Anton
- Amalie Magdalene
- Sophie Louise
- Sophie Juliane
- William Louis
- Christiane Dorothea
- Albert Anton
- Emilie Juliane
- Anna Sophie
- Dorothea Sophie
- Louise Friederike
- Magdalene Sibylle
- Louis Günther II