2009Final results
2009 election for New Jersey Legislative District 18
New Jersey General Assembly · New Jersey
2 seats: Peter J. Barnes III (D), Patrick Diegnan (D) won.
2 seatsPeter J. Barnes IIIDemocrat · winner · incumbent
25.9%26,658
Patrick DiegnanDemocrat · winner · incumbent
25.6%26,317
Joseph SinagraRepublican
23.4%24,091
Robert JonesRepublican
22.1%22,727
Katherine ShkolarOther party
1.6%1,671
Andrew TiddOther party
1.3%1,351
102,815 votes
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET
The seat over time
D − R margin in this seat's races around 2009
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET
The candidates
Peter J. Barnes III (D)Patrick Diegnan (D)Joseph Sinagra (R)Robert Jones (R)
Also on the ballot: Katherine Shkolar (Other party), 1.6%; Andrew Tidd (Other party), 1.3%