The Nyland and Tavastehus County Cavalry Regiment (Swedish: Nylands och Tavastehus läns kavalleriregemente) was a Swedish Army cavalry regiment located in the county of Nyland and Tavastehus that traced its origins back to the 17th Century.

The regiment's soldiers were conscripted mainly from the county of Nyland and Tavastehus.

In the spring of 1700, the regiment was transferred to General Wellingk's army corps in Swedish Livonia.

After the Battle of Poltava in 1709, the regiment was present at the capitulation in Perevolochna.

The regiment was part of General Armfeldt's army of 7,500 men which invaded Norway through Jämtland in August 1718.