The first telephone book ever issued contained only fifty names. The New Haven District Telephone Company published it in New Haven in February 1878.

The USS Nautilus - the world's first nuclear powered submarine was built in Groton in 1954.

Connecticut and Rhode Island never ratified the 18th Amendment (Prohibition).

In 1705, copper was discovered in Simsbury. Later, the copper mine became the infamous New-Gate Prison of the Revolutionary War. Doctor Samuel Higley of Simsbury started the first copper coinage in America in 1737.

The Scoville Memorial Library is the United States oldest public library. The library collection began in 1771, when Richard Smith, owner of a local blast furnace, used community contributions to buy 200 books in London. Patrons could borrow and return books on the third Monday of every third month. Fees were collected for damages, the most common being "greasing" by wax dripped from the candles by which the patrons read. On April 9, 1810, a Salisbury town meeting voted to authorize the "selectmen draw upon the town treasurer for the sum of one hundred dollars" to purchase more books for the Scoville Memorial Library collection, making the library the first publicly supported free town library in the United States.

Mary Kies, of South Killingly was the first woman to receive a U.S. patent. On May 15th, 1809 for a method of weaving straw with silk.

On January 28, 1878, 21 venturous citizens of New Haven became the world's first subscribers to telephone exchange service.

Cattle branding in the United States began in Connecticut when farmers were required by law to mark all of their pigs.

Connecticut is home to the first hamburger (1895), Polaroid camera (1934), helicopter (1939), and color television (1948).

The first automobile law was passed by the state of CT in 1901. The speed limit was set at 12 miles per hour.

The first lollipop-making machine opened for business in New Haven in 1908. George Smith named the treat after a popular racehorse.

In 1937, Connecticut became the first state to issue permanent license plates for cars.

Bristol, CT is considered the "Mum City" of the USA because of the many Chrysanthemums grown and sold to various states and Canada

Danbury, An important military depot for the American Revolutionary armies was burned and looted in April 1777 by the British under Major General William Tryon.

The Submarine Force Museum in Groton is home of the historic ship Nautilus (SSN 571). It is the official submarine museum of the United States Navy.

In colonial New Haven cut pumpkins were used as guides for haircuts to ensure a round uniform style. Because of this fashion, these New Englanders were nicknamed "pumpkin-heads."

The first human inhabitants of present-day Burlington were members of the Tunxis Tribe, who belonged to a confederation of Algonquian Indians. Legend holds they used the area as a hunting ground.

Originally, Montville, along with Groton and Waterford, was a part of New London. New London was settled in 1646 under the name of Pequot, so called after the Pequot Indians, the name changing to New London in 1658.

B.F. Clyde's Cider Mill is the only steam-powered Cider Mill in the United States and is located in Mystic.

7-year-old James Thorsell designed the New Hartford "Town Bicentennial Emblem".

New Milford's worst disaster struck in 1902 when the main business section centered on Bank Street was almost completely leveled by the "Great Fire".

The manufacturing of the first safety fuse started in Simsbury in 1836.

In 1728, the first steel mill operating in America was located in Simsbury.