 | This article relies largely or entirely on a single source. (January 2021) |
| Ulrich III, Duke of Mecklenburg-Güstrow | |
|---|---|
 Ulrich III of Mecklenburg-Güstrow | |
| Duke of Mecklenburg-Güstrow | |
| Reign | 17 February 1555 - 14 March 1603 |
| Predecessor | John Albert I |
| Successor | Charles I |
| Born | 5 March 1527 Schwerin |
| Died | 14 March 1603 (aged 76) Güstrow |
| Spouse | Elizabeth of Denmark Anna |
| Issue | Sophie, Queen of Denmark and Norway |
| House | House of Mecklenburg |
| Father | Albrecht VII, Duke of Mecklenburg |
| Mother | Anna of Brandenburg |
Ulrich III, Duke of Mecklenburg or Ulrich III of Mecklenburg-Güstrow (5 March 1527 – 14 March 1603) was Duke of Mecklenburg (-Güstrow) from 1555-56 to 1603.