Louis Gerlach Pareau, (August 10, 1800 – October 27, 1866) was a Dutch theologian born in Deventer.
He was the son of Jean Henri Pareau (1761–1833), a professor of Oriental languages at the University of Utrecht.
In 1826 he graduated from Utrecht with a dissertation titled Commentatio critica et exegetica in Paulinae Epistolae prioris ad Corinthos caput XIII.
Pareau was one of the three founders of the so-called "Groningen School", a progressive movement within the Dutch Reformed Church.
With Petrus Hofstede de Groot (1802-1886), he was co-author of the Encyclopaedia theologi Christiani.