Throughout its existence, the Committee was filled with members who were bought and paid controlled opposition to William M. Tweed, allowing him to practically rule the city by decree until his downfall in 1871.

[10] Brookfield was supported by Patterson, and most of the older leaders of the Borough's Party, and his election resulted in violent protests by Platt men outside the hall which had to be repulsed by police.

[11] Brookfield was a member of the Committee of Seventy which nominated a fusion candidate to defeat Tammany hall in the 1895 New York City mayoral election.

[12] A Rutgers College educated Lawyer, Matthew Linn Bruce moved to New York City in 1890, working as a clerk for a law firm, and being involved in his local assembly's Republican politics.

In 1910, the New York County Republican Committee chairman Parsons resigned, and Griscom was offered the office by the political boss and close personal friend Otto Bannard, who had unsuccessfully run for mayor in 1905.

As chairman, he had to find a suitable candidate for the 1910 New York state election and ended up choosing another lawyer and friend, Henry L. Stimson.

However, the leader of Tammany Hall told Griscom after the election, if the campaign lasted another week, he would have expected Stimson to win.

Griscom resigned shortly after the 1912 Republican National Convention, which he described as "the most painful situations I ever knew and led to my ultimate disgust with politics.

"[20] A Hungarian-Jew immigrant and New York University School of Law educated lawyer, Koenig was elected the leader of the sixth ward and was a presidential elector in 1900.

He was elected Secretary of State of New York in 1908, losing re-election in 1910, and in 1915 he was hand selected as the chairman of the party by Griscom when he resigned,[20] serving until 1933.

[26] A Harvard Law School educated lawyer and veteran of the Pancho Villa Expedition, World War I, and like his predecessor, also a member of the New York Young Republican Club,[21] Simpson was a prominent Roosevelt Republican, he was elected the chairman of the party in 1935 and led the party through five of its most turbulent years.

[21] He successfully got Fiorello La Guardia re-elected, severely damaging the power of the Democratic Tammany Hall in the city and campaigned heavily for Thomas E. Dewey's 1938 bid for governor.

[28] A local judge, Bernard Newman was selected as the party chairman in 1958 and acted as a rival to the powerful Tammany Hall boss Carmine DeSapio.

He was also remembered for his lengthy and loud rivalry with mayor Robert F. Wagner Jr., calling him a "peanut politician" during the 1960 United States presidential election when he welcomed and met with John F. Kennedy but not Richard Nixon.

[29] A banker born in 1914, Vincent Albano Jr. got involved in politics in 1949 when he became the Republican leader of his Assembly District in Stuyvesant Town.

Identified with the more liberal faction of the party, he led a push to have more women run in elections against their male Democratic counterparts.

[30] His Democratic counterparts called him a "corrupt political boss" following accusations he bribed the city for $840,000 in contracts to be awarded to companies run by his personal friends, and for putting his family members on the party payroll.

[21] During this, he frequently clashed with the party due to his support of gun control, gay marriage, and a restoration of the death penalty.

As chairman, Ortenzio had to submit an Annual Statement of Financial Disclosure with the New York State Ethics Commission, and in September 2004 he received $100,000 from Fisher Brothers for consulting services, which he did not disclose.

[42] A hands off Chairwoman, she let the New York County Republican Committee make most important decisions, acting mostly as a mouthpiece for the party.

[44] However, his tenure would be rocked with scandal when he was offered a $25,000 bribe to help Democratic state Senator Malcolm Smith get on the Republican ballot for the 2013 New York City mayoral election.

A former Senate Budget Committee staffer, during her tenure, she focused heavily on defeating Bill de Blasio in the 2017 New York City mayoral election, hosting a series of Republican candidates including Paul Massey, a real estate executive, Michel Faulkner, a pastor from Harlem, Richard Dietl, a retired NYPD detective, and the eventual candidate Nicole Malliotakis, an assemblywoman.

[47][48] In 2015 the party hosted NYC Police Commissioner Raymond Kelly at the Metropolitan Republican Club in an effort to draft him to run for mayor, however, he would decline to be a candidate.

[51] After the 2016 United States presidential election, the Manhattan Republican Party focused its efforts on the Upper East Side, where it sees the most support.

[54] After leaving the office Adele has served as a board member for the American Journalism Institute, has worked as a reporter for the Washington Examiner and The New York Sun as well as being the president of The Daily Caller News Foundation.

She stated after her election, that despite her being pro-life, she will toe the Manhattan Republican Party's platforms of being Pro-choice, pro-LGBTQ, and generally Socially Liberal.

[58][59]< On October 12, 2018, the party hosted Gavin McInnes, the founder of the Proud Boys and the co-founder of Vice at the Metropolitan Republican Club.

The club has several famous alumni, including former Governor George Pataki, former mayors Rudy Giuliani and Ed Koch, New York State Comptroller Edward Regan, Congressmen Bill Green, and several assemblymen, councilmen and candidates for other offices, including Bret Schundler, two time candidate for Governor of New Jersey.

The group promotes electoral reform, outreach and community engagement, and branding for local candidates and party affiliates.