Erich Haagensen Jaabech (6 December 1761 – 4 January 1845) was a Norwegian farmer who served as a representative at the Norwegian Constitutional Assembly.Jaabech was born on Usland at Øyslebø in Vest-Agder, Norway.
He was the son of Haagen Olson Usland (1721-1773) and Marte Eriksdtr.
Skjævesland (1731-1790).
In 1788, he married Gunhild Olsdtr.
Skjævesland (1763-1844) with whom he had eight children.He was a farmer who also worked as a teacher in Øyslebø and Holum.
In 1806, he bought the farm Jaabekk in Halse parish (Jåbekk gård i Halse ved Mandal) and established residence at that farm.
He was also active as a trader, blacksmith and cooper.
He was elected to the Norwegian Constituent Assembly in 1814, representing the constituency of Mandals Amt (now Vest-Agder) together with Osmund Andersen Lømsland and Syvert Omundsen Eeg.
At the Assembly, all three supported the union party (unionspartiet).