Skip to main content
Portrait of John DiMaio, State Representative for New Jersey District 23
Wikipedia / Wikimedia Commons · cc-by-sa-4.0

Serving · State House · New Jersey

John DiMaio

State Representative · New Jersey · District 23 · Republican

John DiMaio serves as a State Representative in the New Jersey House of Representatives, representing District 23 for the Republican party. The page below collects sourced biographical facts, the seat and district served, and provenance for DiMaio.

Key facts

Full name
John DiMaio
Office
State Representative
Chamber
New Jersey House of Representatives
State
New Jersey
District
District 23
Party
Republican
Status
Currently serving
Born
1955
OpenStates ID
ocd-person/dce6ec3a-7d62-4b33-8693-259364c85285
Dataset version
1.20260609

Biographical narrative

1,122 words · sourced from the Wikipedia REST extract

John DiMaio is a prominent American politician affiliated with the Republican Party, currently serving as a member of the New Jersey General Assembly representing the 23rd legislative district. He has been in office since being appointed in 2009 to fill a vacancy and has since established himself within the state's political framework. DiMaio has held various leadership positions, including co-chair of the Republican Conference and Minority Leader of the General Assembly, reflecting his active role in legislative affairs and party organization.

Early life and career

John DiMaio was born on November 27, 1955, in Newton, New Jersey, and was raised in Hackettstown, a town that has played a significant role in his political development. He completed his secondary education at Hackettstown High School, graduating in 1974. His early involvement in civic activities began during his high school years when he became the president of the Hackettstown Democratic Club, indicating an early interest in political engagement and community service. Additionally, he was a charter member of the Hackettstown First Aid and Rescue Squad's Youth Squad, which later led to his lifelong commitment to public service as he became a life member of the squad.

DiMaio's political career commenced in 1980 when he was elected to the Hackettstown Town Council, where he served for a decade. His tenure on the council included a significant milestone when he was elected mayor in 1991. However, his time as mayor was marked by a transition in his political affiliation; in March 1995, he switched from the Democratic Party to the Republican Party. This change reflected a broader shift in his political ideology and strategy, aligning with the values and policies of the Republican Party at that time.

In addition to his role as mayor, DiMaio served on the Hackettstown Municipal Utilities Authority from 1991 until 1995 and returned to this position in 1999, demonstrating his ongoing commitment to local governance and infrastructure management. His leadership capabilities were recognized when he was elected president of the New Jersey Conference of Mayors in 1999. However, his political career faced challenges, as he was defeated in his bid for re-election as mayor in 1999 by Democrat Roger Hines, marking a significant moment in his early political journey.

Following his tenure as mayor, DiMaio continued his public service by becoming a Warren County Commissioner in December 2000. He was selected by the Warren County Republican Committee to fill the remainder of the term of the incumbent commissioner who had been elected County Surrogate. His leadership skills were further acknowledged when he was appointed Board Director for the year 2001 and later re-elected as Freeholder Director in 2008. During his time as Freeholder, he was actively involved with the North Jersey Transportation Planning Authority, where he served as vice-chair in 2008. This role allowed him to influence transportation policy and planning in the region, showcasing his commitment to addressing local infrastructure needs.

In addition to his political roles, DiMaio is also a businessman, owning A. DiMaio and Son, Inc., a general contracting company based in Hackettstown. His professional background in business has likely informed his perspectives on economic and regulatory issues, contributing to his legislative work.

Legislative service

John DiMaio's legislative career in the New Jersey General Assembly began on February 21, 2009, when he was appointed to fill the vacancy left by Marcia A. Karrow, who had moved on to the New Jersey Senate. His selection came after a special election convention held by Republican committee members from Hunterdon and Warren counties. DiMaio's election to the Assembly was competitive, as he faced other candidates from the Hunterdon County Board of Chosen Freeholders. Ultimately, he secured his position through a series of ballots, demonstrating his ability to garner support within the party.

DiMaio was sworn into office on March 16, 2009, marking the beginning of his formal legislative duties. Upon entering the Assembly, he was assigned to the Agriculture and Natural Resources Committee and the Telecommunications and Utilities Committee, where he could contribute to discussions and decisions on key issues affecting these sectors. His legislative work has included participation in various initiatives and discussions relevant to his district and the state.

In the June 2009 Republican primary, DiMaio successfully defended his Assembly seat, indicating his continued support within the party and among constituents. He and his running mate, Erik Peterson, managed to secure their positions on the November general election ballot, where they faced Democratic challengers. Their successful campaign in the general election further solidified DiMaio's role as a key figure in the New Jersey Assembly.

Over the years, DiMaio has taken on additional leadership responsibilities. Since January 14, 2020, he has served as co-chair of the Republican Conference alongside Nancy Munoz, a role that underscores his influence within the party and his commitment to Republican values in the legislature. Furthermore, he was elected Minority Leader of the General Assembly after Jon Bramnick transitioned to the State Senate, reflecting his peers' recognition of his leadership capabilities.

Policy focus and district

As a member of the New Jersey General Assembly representing the 23rd legislative district, DiMaio's policy focus encompasses a range of issues pertinent to his constituents. The 23rd district includes parts of Hunterdon and Warren counties, areas characterized by a mix of suburban and rural communities. This demographic diversity informs DiMaio's legislative priorities, which often center around local governance, economic development, and infrastructure improvements.

DiMaio's involvement in the Agriculture and Natural Resources Committee suggests a commitment to issues affecting the agricultural community, which is vital to the economy of New Jersey. His work in this committee likely involves addressing concerns related to land use, environmental regulations, and support for local farmers, all of which are critical to sustaining the agricultural sector in his district.

In addition to agricultural issues, DiMaio's role on the Telecommunications and Utilities Committee indicates an interest in modernizing infrastructure and ensuring reliable services for residents. This focus is particularly relevant in an era where technology and connectivity are increasingly important for economic growth and quality of life.

As a Republican legislator, DiMaio's policy positions may align with broader party principles, including fiscal conservatism, limited government intervention, and support for business development. His background as a businessman may influence his approach to economic policy, emphasizing the need for a favorable business climate to promote job creation and economic stability in his district.

Overall, John DiMaio's legislative career reflects a blend of local governance experience, business acumen, and a commitment to addressing the needs of his constituents in New Jersey's 23rd legislative district. His ongoing service in the General Assembly positions him as a significant figure in state politics, with the potential to influence policy decisions that impact the lives of residents in his district and beyond.

Notable legislation

Sponsored and co-sponsored legislation for John DiMaio is pending operator curation. The biographical narrative above carries the same provenance trail until per-bill rows are written.

Sources

  1. [1]https://en.wikipedia.org/wiki/John_DiMaioWikipedia · retrieved 2026-06-09

Notable quotes

Sourced quotes for John DiMaio are pending operator curation. Narrative-scope provenance remains attached below.

Sources

  1. [1]https://en.wikipedia.org/wiki/John_DiMaioWikipedia · retrieved 2026-06-09

Key positions

Curated policy positions for John DiMaio are pending operator review. The biographical narrative above carries the same provenance trail until per-topic positions are written.

Sources

  1. [1]https://en.wikipedia.org/wiki/John_DiMaioWikipedia · retrieved 2026-06-09

Legislative service

  1. New Jersey House of RepresentativesDistrict 23 · Republican

Sources & provenance

Every attributable claim above carries a per-section [N] marker that resolves to the corresponding URL below. Each entry records the upstream provider, the canonical URL, and the timestamp at which the source was retrieved by the ingest pipeline.

Explore the State House

Browse New Jersey’s District 23 seat, the full New Jersey House of Representatives roster, or New Jersey’s federal candidates.