Senator Patrick Diegnan Contact information

Patrick J. Diegnan Jr. was born on March 19, 1949, and is an American lawyer and Democratic Party politician. He has represented the 18th Legislative District in the New Jersey Senate since 2016.

Diegnan is the youngest of seven children born to immigrants from Ireland. He was born and raised in South Plainfield, attending Sacred Heart Grammar School and then graduating from South Plainfield High School in 1966. Residents of South Plainfield, Diegnan and his wife Anita have been married since 1976 and have two children, Heather and Tara, along with a grandchild.

Diegnan received a B.A. from Seton Hall University in Political Science / Government in 1970 and was awarded a J.D. from the Seton Hall University School of Law in 1973. Currently, Diegnan is an attorney in private practice in South Plainfield and is a member of the New Jersey and Middlesex County Bar Associations since 1974. He is also a former instructor of law and accounting at Middlesex County College.

Diegnan is currently the borough attorney for Spotswood and formerly served as borough attorney for South Plainfield and Milltown. Diegnan was first elected to represent the 18th District in 2001 replacing Barbara Buono who had been elected to the New Jersey Senate. He was re-elected to seven more two-year terms. Diegnan served in the Assembly as Deputy Speaker (2008-2016) and Parliamentarian (2005-2016), and was Chairman of the Education Committee and a member of the Regulated Professions and Consumer Affairs Committees.

Diegnan was selected by local Democratic committee members to receive appointment to the 18th District’s Senate seat on May 5, 2016, after previous seat holder Peter J. Barnes III was appointed to a judgeship on the New Jersey Superior Court. Sworn into office on May 9, Diegnan won election to the remainder of the term in November, defeating retired judge and former Middlesex County Freeholder Roger W. Daley.

As of the 2020 Census, New Jersey state senators represented an average of 232,362 residents. After the 2010 Census, each member represented 220,188 residents. New Jersey State Senate District 18 is represented by Patrick Diegnan Jr. (D). His current term ends on January 11, 2028.