Tetulia (Bengali: তেতুলিয়া), historically spelt as Tentulia, is the northernmost region of Bangladesh, constituting an upazila in Panchagarh District of Rangpur Division.

Tetulia is also notable for views of Kangchenjunga, the third highest mountain in the world, from its plains, rivers and tea gardens.

According to the 2011 Census of Bangladesh, Tetulia Upazila had 27,908 households and a population of 125,454.

Tetulia had a literacy rate (age 7 and over) of 47.32%, compared to the national average of 51.8%, and a sex ratio of 977 females per 1000 males.

Several bus companies (especially Hanif Enterprise, Shyamoli Paribahan and Burimari Express) operate their services from Dhaka.

Teknaf and Tetulia are the two farthest points in the country, with about 1,004 kilometers between them.