New Jersey state legislative districts, based upon 2000 U.S. census, went into effect 2001.
Sources:

Outline maps came from: [1], believed ((PD-ineligible)).
Converted to SVG, edited in Inkscape.
Numbering as per [2] (PDF).
No machine-readable source provided. Own work assumed (based on copyright claims).
No machine-readable author provided. ChrisRuvolo assumed (based on copyright claims).