In 1749 Sweden began as the first country in the world to keep reliable records of its population. The figures for Sweden after that year are exact but for the earlier years are they just estimates that gets more uncertain the further back in time they are.

(Sweden have two columns with alternative estimates)

Sweden have two columns with alternative estimates because different methods have been used, however both refer to Sweden within its present borders (those in purple are more likely). Denmark's two columns on the other hand refer to different territories; figures in purple = within Denmark's historical borders (i.e. also the Scanian lands and Schleswig), figures in blue = within Denmark's present borders. A more detailed discussion about these estimates are available in Swedish.

Iceland's population is believed to have varied between 40 000 and 60 000 from the tenth century to the middle of the nineteenth century.

The figures for Denmark and Norway 1770 and 1800  refers to 1769 and 1801 respectively. Apart from these years are the Norwegian statistics before 1800 just estimates. Iceland's figures come from www.statice.is..

There is also a page on the Swedish counties.