| Anton Günther I, Count of Schwarzburg-Sondershausen | |
| Noble Family: | House of Schwarzburg |
| Father: | Christian Günther I, Count of Schwarzburg-Sondershausen |
| Mother: | Anna Sibille of Schwarzburg-Rudolstadt |
| Spouse: | Countess Palatine Mary Magdalene of Zweibrücken-Birkenfeld |
Count Anton Günther I of Schwarzburg-Sondershausen (9 January 1620 - 19 August 1666) was the ruling Count of Schwarzburg-Sondershausen from 1642 until his death in 1666.
Count Anton Günther I was the son of the Count Christian Günther I of Schwarzburg-Sondershausen (1578-1642) and his wife Countess Anna Sibille (1584-1623), daughter of Count Albert VII of Schwarzburg-Rudolstadt.
After his father's death, he and his brothers Louis Günther II and Christian Günther II divided Schwarzburg-Sondershausen. Anton Günther I received most of Lower Schwarzburg-Sondershausen, except for a few districts that went to Louis Günther II.
He did much for the churches and schools and laid the foundation stone of the church in Sondershausen that replaced the one that had burned down in 1621. In 1657, the parish and school buildings burned down; he rebuilt those as well.
Anton Günther I married on 29 October 1644 with Mary Magdalene (1622-1689), a daughter of Count Palatine George William of Zweibrücken-Birkenfeld. They had the following children: