The contract will be worth about $8 million per year over a six-year period.
The deal was reportedly in jeopardy earlier on Friday when the Ravens offered Scott a five-year, $42 million contract as the Jets originally handed him a five-year, $40 million deal but New York increased its offer and he accepted.
Scott, 28, now joins former defensive coordinator turned head coach Rex Ryan in the Big Apple.
Ryan promised to give the Jets an identity in his opening press conference and bringing in one of his own players will very much hammer that point home.
Scott fits the Jets 3-4 scheme perfectly long with hybrid linebacker/defensive lineman Calvin Pace in giving them a quality pass rush to go along with sold pass coverage against tight ends down the field. The Jets were one of the worst in the NFL in covering that position.
Scott's skills will be needed to help a struggling Jets pass defense from 2008, as they finished near the bottom.
The Jets still have issues at the quarterback position and with wide receiver depth, but landing Bart Scott is a good first step in convincing Jets fans that a new era is starting again at Giants Stadium.