Knut Andreas Pettersen Agersborg (1765–1847) was a Norwegian politician.
Agersborg was born at Vefsn in Nordland county, Norway. He worked as a farmer, fisherman, and ship-owner. He also served as police sergeant in his village.[1] He served as a deputy representative to the Norwegian Parliament during the term 1824–1826, representing the constituency of Nordlands Amt (now Nordland).[2]