| Princess Ulrike Friederike Wilhelmine | |
| Full Name: | German: Ulrike Friederike Wilhelmine |
| Countess/Duchess of Oldenburg | |
| Spouse: | Frederick Augustus I, Duke of Oldenburg |
| Issue: | Wilhelm, Duke of Oldenburg Princess Luise Hedvig Elisabeth Charlotte, Queen of Sweden and Norway |
| Royal House: | Hesse-Kassel |
| Father: | Landgrave Maximilian of Hesse-Kassel |
| Mother: | Landgravine Friederike Charlotte of Hesse-Darmstadt |
| Birth Date: | 31 October 1722 |
| Birth Place: | Kassel |
| Death Place: | Eutin |
Princess Ulrike Friederike Wilhelmine of Hesse-Kassel (German: Ulrike Friederike Wilhelmine Prinzessin von Hessen-Kassel (31 October 1722, Kassel; 28 February 1787, Eutin) was a member of the House of Hesse-Kassel by birth, and of the House of Holstein-Gottorp through her marriage to Frederick Augustus I, Duke of Oldenburg. Ulrike was the Duchess consort of Oldenburg from 1774 until her husband's death on 6 July 1785.
Ulrike married Prince Frederick Augustus of Holstein-Gottorp, son of Christian August, Duke of Holstein-Gottorp and his wife Margravine Albertine Friederike of Baden-Durlach, on 21 November 1752 in Kassel. Ulrike and Frederick Augustus had three children: