Apizza (pronounced "ah-beets") is a popular type of pizza in New Haven, Connecticut characterized by its prolonged baking time in extremely hot coal ovens and the high moisture content of the dough. Due to these two defining characteristics, the result is a pizza with a thin, black, crispy, and charred crust that might appear to be burnt, but instead has a deliciously chewy texture and flavor.

Usual toppings are sparse, including grated cheese and tomatoes or anchovies so that the pizza won't be over-sauced or over-topped, and as they are formed by hand, there is no uniform shape of these pizzas. It was invented by Frank Pepe, an Italian baker who sold two versions of Neapolitan style pizza, topped with grated cheese, garlic, oregano, olive oil, and anchovies or tomatoes. 

Pepperoni pizza is an American pizza variety which includes one of the country's most beloved toppings. Pepperoni is actually a corrupted form of peperoni (one “p”), which denotes a large pepper in Italian, but nowadays it denotes a spicy salami, usually made with a mixture of beef, pork, and spices.

The popularity of pepperoni pizza had only started to rise in the 1950s. Nowadays, beef pepperoni pizza is the most popular pizza variety, but there are also versions such as fish pepperoni pizza and port pepperoni pizza. The preparation varies from one state to another, but the popularity of this pizza has made it a staple across the United States, and it’s usually prepared simply with mozzarella, tomato sauce, and pepperoni.

Somewhat similar to a calzone, the American stromboli is a savory type of turnover filled with classic pizza ingredients: mozzarella or other types of cheese, Italian meats like salami, pepperoni, bresaola, and capocollo, and sometimes even vegetables, while the marinara sauce is served on the side, rather than baked inside with the filling.

The dough can be either Italian bread dough or standard pizza dough, and before baking, the finished product is rolled into a loaf, similar to that of a jellyroll. Unlike calzone, stromboli did not originate from Italy, but supposedly from suburban Philadelphia where it was invented in the 1950s and named after one of Roberto Rossellini's movies.

New York-style pizza is a large, thin-crusted pizza that evolved from the classic Neapolitan-style pizza, brought to New York City by Italian immigrants during the early 1900s. The dish began with the opening of America's first pizzeria, called Lombardi's, where the owner Gennaro Lombardi served unusually large and wide pizza pies.

When sliced, the pieces are also very large and wide, while the crust is crispy, yet foldable for easier consumption. Some claim that the unique texture of the crust owes much to the minerals that are only found in New York City's tap water. Traditionally, the pizza is topped with mozzarella and heavily-seasoned tomato sauce (olive oil, tomatoes, garlic, sugar, salt, oregano, crushed red pepper, basil), while the additional ingredients such as vegetables or sausage come on top of the cheese. 

In the United States, Sicilian pizza denotes a thick, square-shaped dough topped with mozzarella cheese and tomato sauce. The sauce is often placed on top of the cheese in order for the crust to be well-cooked. This pizza was brought to the United States (primarily New York) by Sicilian immigrants, and it was derived from sfincione.

Although sfincione doesn't contain mozzarella, Italian bakeries in NYC had access to inexpensive mozzarella so it was only logical that they began to top their sfincione with it. Nowadays, Sicilian-style pizza is popular in numerous Italian-American communities in New York, New Jersey, Michigan, Connecticut, Rhode Island, and Massachusetts.

Apart from the crispy, almost cracker-thin crust, this Chicago-style pizza features a heavily herbed, zesty tomato sauce and generous amounts of shredded mozzarella. As for the other toppings, pepperoni is widely available but often comes second to crumbled Italian sausage, and then there's also bacon, prosciutto, and a variety of vegetables.

The number one choice among locals, Chicago thin crust is typically cut into squares—the so-called box cut, tavern-style, or party cut—and unlike its New York counterpart, it doesn't fold up. In fact, the Chicagoans would say you should "fold your laundry, not your pizza".

Detroit-style pizza is a square pizza characterized by a thick deep-dish crisp crust and inverted toppings. Cheese is applied directly to the top of the dough, followed by a thick tomato sauce that is seasoned with garlic and spices. The most common topping is pepperoni, put either on top of the sauce or buried underneath the cheese.

Detroit-style pizza can be traced back to Buddy's Rendezvous in 1946, and thanks to its popularity, it is now available nationwide. This dish is best paired with beer or wine.

Greek pizza was created by Greek immigrants in Boston, in the late 1960s. It is characterized by its thick, wettish dough, greasy cheese, and tomato sauce with a strong taste of oregano. This type of pizza is usually baked in a heavily greased pan, which results in a lacy, crisp edge and fried bottom crust.

Greek ingredients such as artichokes, feta cheese, and Kalamata olives are favorable for the toppings, and although not necessary; pepperoni is also often used as a topping. As this dish does not reheat well, it is advised to consume it within the first fifteen minutes after baking.

Grandma pie is an American pizza variety that differentiates itself by the crust – due to the fact that the dough isn't allowed to proof for a long time, it turns out thin and dense. The pizza is baked in metal pans, resulting in rectangular slices that are crispy on the bottom.

It is typically topped with shredded mozzarella, tomato sauce, garlic, and olive oil, although there are numerous variations with added ingredients such as sausages and broccoli rabe. Grandma pie originated on Long Island at a family-run restaurant called Umberto's.