Siv Henriette Jacobsen (born 14 January 1966) is a Norwegian politician for the Labour Party.
She served as a deputy representative to the Parliament of Norway from Østfold during the terms 2005–2009 and 2017–2021.
Hailing from Andøy, she studied in the US and settled at Jeløya.
After stints in Moss municipal council and Østfold county council she became deputy county mayor in 2015.