Statutes are written laws passed by Congress or a state legislature and signed into law by the president or a state governor. Statutes are often gathered into compilations called "codes," large sets of books that can be found in many public and all law libraries and on the Internet. (Definition from Nolo.)
Not all law is statutory law. Some laws can be case law or administrative law. Therefore, do not get discouraged if you cannot find a statute on your particular issue.
An alphabetical list of popular and statutory names of Acts of Congress based on the 2006 edition of the U.S. Code. Available online at http://uscode.house.gov/popularnames/popularnames.htm
New Jersey's General and Permanent Statutes
United States Statutes At Large
"The United States Statutes at Large... is the permanent collection of all laws and resolutions enacted during each session of Congress".
Statutory Research Tutorial (Georgetown Law)