Due to the importance of regional trade at Lexington, the route of the Northern Pacific Railroad was planned to pass near there. Aitkin was founded in 1870 when the Northern Pacific Railroad was extended to that point, replacing and annexing Lexington. The city and county were named for William Alexander Aitken, a partner of the American Fur Company and chief factor of the company's regional operations in the early 19th century.
Due to the importance of regional trade at Lexington the route of the Northern Pacific Railroad was planned to pass near there Aitkin was founded in 1870 when the Northern Pacific Railroad was extended to that point replacing and annexing Lexington The city and county were named for William Alexander Aitken a partner of the American Fur Company and chief factor of the company's regional operations in the early 19th century