Because it was in the middle of all the other colonies.
No it's not. The Middle Colony states were New York, New Jersey, Pennsylvania, and Delaware
The four colonies of the Middle Colonies are Pennsylvania, Deleware, New York (and Vermont), and New Jersey.
Pennsylvania New York New Jersey Maryland Delaware
The colonies included: New Jersey, Pennsylvania, Delaware, and New York.Order of the Middle Colonies:New York ~ founded by Peter Minuit (for Dutch) and Duke of York (for England) ~ 1626.Delaware ~...