The History 

Dunkin' Donuts has been around since 1950. Today, loyal customers like you can be found in 40 different countries, stopping off for a cup of the world-famous coffee and a fresh, delicious donut, bagel, muffin, or other baked good. 
It all started in 1946 when Mr. William Rosenberg founded Industrial Luncheon Services, a company that delivered meals and coffee break snacks to factory workers in the outskirts of Boston, Massachusetts. The success of Industrial Luncheon Services led Rosenberg to open his first coffee and donut shop, the "Open Kettle". Then, in 1950, Rosenberg opened the first store known as Dunkin' Donuts in Quincy, Massachusetts.
Today, there are nearly 5,000 Dunkin' Donuts shops in the United States and 40 countries, and that makes it to the largest coffee, bagel and donut shop in the world.

Fun Facts About Dunkin' Donuts

Dunkin' Donuts originally sold donuts for 5 cents and coffee for 10 cents. The price for coffee was twice what others were charging, but patrons were willing to pay the extra because of the quality of the product.
One of the largest Dunkin' Donuts shops is located in Bangkok. there is it space for 130 people! Canada, Eastern Europe and the Philippines are also known for their large Dunkin' Donuts stores.
Dunkin' Donuts is the largest coffee, bagel and donut shop in the world with 5,000 locations in the United States and 40 Countries.
Dunkin' Donuts serves approximately 650 million cups of coffee per year or 1.8 million cups a day.
Dunkin' Donuts sell to more than 2 million people every day.
Dunkin' Donuts serves approximately 6.4 million donuts each day or 2.3 billion a year.
There are more than 3,600 Dunkin' Donuts shops and approximately 1,400 franchisees in the U.S.
Two years after introducing freshly baked bagels in 1996, Dunkin' Donuts has become the largest retailer of bagels in the U.S. selling more than 4 million bagels every week.
Dunkin' Donuts same store sales volume increased by 5.8 percent in fiscal year 1999.
Dunkin' Donuts has 
experienced a 25 percent sales growth over the last three years. The growth can be attributed to its quality of products, loyal customers and strict standards required while preparing each product.
Dunkin' Donuts University (DDU) was established in 1966. Every Dunkin' Donuts franchisee must pass an intensive program at DDU that teaches the process to make fresh, delicious products that customers have grown to expect.
Dunkin' Donuts is based in Randolph, MA and employs approximately 800 people at its corporate headquarters.
The well-known Dunkin' Donuts character Fred the Baker, first introduced in 1982, retired from his position in 1997 and is now the official "Dunkin' Donuts Diplomat."
Dunkin' Donuts is a wholly-owned subsidiary of Allied Domecq PLC, one of England's largest international companies. Dunkin' Donuts' sister retail companies are Baskin-Robbins and Togo's.

We took this facts from Dunkin Donuts.com