Silvester Sedborough (1515/16-1551), of Porlock, Somerset, was an English politician.
Sedborough was the eldest son of William Sedborough of Porlock and Joan, a sister and coheiress of Jerome Bratton of Porlock.
Silvester Sedborough married twice, firstly to Anne Staveley, by whom he had one son, Robert, and two daughters.
He was a Member (MP) of the Parliament of England for Bath in 1545.
This article about a 16th-century member of the parliament of England is a stub.