When Italian immigrants began arriving in the late 1900's they brought their recipes from Italy with them. It seems that pizzas were first sold by peddlers who would sell pizza from the street. The peddlers could be found in cities such as New York, Chicago and Philadelphia. It didn't take too much time for small cafes to start selling pizzas and other Italian food to the new Italian-American community.
You will find the first printed reference to pizza in a Boston Journal article in 1904. Two brother who came from Naples Italy were the first to offer their pizza in 1903. The price of a pizza pie was five cents! But since that was a lot of money back then, people would negotiate the amount they could spend and then were given a slice equivalent to the price they could pay.
In 1910, pizza game to Trenton New Jersey with the opening of Joe's Tomato Pies. And the D'Amore family started selling pizzas in Los Angeles in 1939.
It wasn't until after the Second World War that pizza became popular with more than just the Italian community. Soldiers who were in Italy during the war got a taste for pizza and other Italian dishes. Soon there were all sorts of chain restaurants opening around the US including Shakeys Pizza (1954), Pizza Hut (1958) and Josey's Pizza (1943).
Today there are many popular pizza restaurants and most have home delivery. The most popular are Domino's, Papa John's Pizza, Giordano's Pizza, and Godfather's Pizza.