Jefferson St, Smithtown
- Jefferson St 276 Smithtown Boulevard, Llc
- Jefferson St Watts, Maureen M
- 3 Jefferson St 3 Jefferson Street Realty
- 5 Jefferson St Reed, Douglas
- 7 Jefferson St Yakici, Kursat
- 10 Jefferson St Lynam, Melissa
- 11 Jefferson St Brabant, John/Susanne
- 14 Jefferson St Hammer, Lawrence
- 15 Jefferson St Granzio, Edgar
- 17 Jefferson St Conte, Michael F/Nicola
- 18 Jefferson St Bronnekant, Jeffrey
- 20 Jefferson St Jung, Harry
- 21 Jefferson St Tamborski, John H
- 22 Jefferson St Watts, Maureen M
- 24 Jefferson St Rongo, Joseph/Joanna
- 25 Jefferson St Siegel, Lilli
- 27 Jefferson St Miro, Diane
- 29 Jefferson St Baron, Michael
- 30 Jefferson St Bear Properties, Llc
- 34 Jefferson St Seppe, Angelina
- 37 Jefferson St Baron V Realty Corp