Robert Knollys (died 1559) was an English soldier and politician during the Tudor period. He served as a Member of Parliament for Berkshire and was known for his military involvement, particularly in the Italian Wars. His career was marked by his loyalty to the crown and participation in various military campaigns. Knollys was also connected to the influential Knollys family, which played a significant role in English politics and society. His descendants continued to be active in public life, contributing to the legacy of the family. Knollys' life reflects the intertwining of military service and political duty in 16th-century England.