Using the Land Books ("jarðarbøkur") it is speculated, that the number of inhabitants in Sørvág in the 17th century was around fifty. In the first census in the Faroes in 1801 the number of inhabitants in Sørvág had risen to a mere 86. In 1855 the number of inhabitants was 163. The reason for this slow progress is due to the special requirements for marriage, that were law in the Faroes. The law said, that in order to marry you would need to own land or have demonstrated that you were a faithful servant to someone who owned land. It was only the wealthy farmers who had a substantial amount of land, and therefore the birthrate in the Faroes was very low until this law was abolished.