Matilda of Brunswick-Lüneburg (Polish: Matylda, German: Mechthild) (1276 – 26 April 1318) was a German noblewoman and member of the House of Welf. She was a Duchess of Glogów by marriage to Henry III of Glogów. She was the regent of the Duchy of Glogów after the death of her spouse between 1309 and 1312.
During her marriage, Matilda gave birth to nine children, five sons and four daughters. After Henry III's death in 1309, and despite the fact that her eldest son Henry IV the Faithful was of legal age to rule by himself, Matilda became the regent of her husband's duchies (except Glogów, which was given to her by Henry III in his will as her dower) until 1312.
Hedwig (born c. 1308 – died before December 1309).
On her death, Glogów was inherited by her sons Henry IV and Przemko II as co-rulers until 1321, when they divided their domains and Przemko II retained Glogów as sole ruler.