Craig Newmark

In August 2018, Newmark donated $1 million to Mother Jones to help the magazine combat fake news.

In January 2017, TechCrunch reported that Newmark donated $500,000 to Wikipedia's attempt at "reducing harassment and vandalism on the site and improve the tools moderators use every day to keep the peace."

In May 2017, Forbes estimated that Newmark's net worth is at least $1.3 billion based on his ownership of at least 42% of Craigslist. He called a prior $400 million Forbes estimate of his net worth "bogus." In an interview published in 2017 he said that "By monetizing Craigslist the way I did in 1999, I probably gave away already 90 percent or more of my potential net worth." Newmark has described his business philosophy as "minimal profit" rather than non profit: "Basically I just decided on a different business model in '99, nothing altruistic. While Silicon Valley VCs and bankers were telling me I should become a billionaire, I decided no one needs to be a billionaire — you should know when enough is enough. So I decided on a minimal business model, and that's worked out pretty well. This means I can give away tremendous amounts of money to the nonprofits I believe in."

In 2016, Newmark joined with the progressive RAD Campaign and Lincoln Park Strategies (founded by Democratic Party stalwart Stefan Hankin) to commission a poll examining user perceptions about social media conflicts during the 2016 election year.

Through Craig Newmark Philanthropies, Newmark has contributed more than $40 million to journalism initiatives since 2015. In 2017, he donated $1 million each to ProPublica and the Poynter Institute. He made a $20 million endowment to the CUNY Graduate School of Journalism, which was subsequently renamed the Craig Newmark Graduate School of Journalism. Newmark also has a private charitable foundation, to which he contributed $50 million in 2016. Newmark's foundation supports military families, voter registration efforts, and women in technology. In 2018 Newmark's donations totaled $143 million. In 2019, he donated $6 million to Consumer Reports to fund a Digital Lab focused on consumer privacy rights and digital security.

Newmark has donated to the presidential campaign of Democratic Senator and former United States Secretary of State John Kerry. He also supported former President Barack Obama. In 2015, Variety reported that he contributed to the presidential campaign of Hillary Clinton.

In 2014, he was one of 60 Democratic Party donors who urged the creation of a system of public election funding.

Newmark splits his time between San Francisco's Cole Valley and the West Village in New York City. He describes himself as a non-practicing, secular Jew, joking that his rabbi was the late singer Leonard Cohen. Newmark married Eileen Whelpley in December 2012.

In 2011, he introduced craigconnects to support non-profits and other organizations "that get things done on a sustainable basis." He declared it "the biggest thing in my life."

In 2006, he donated $20,000 to a non-profit group, NewAssignment.Net, an attempt to combine the work of amateurs and professionals to produce investigative stories on the Internet.

After college, Newmark worked at IBM for 17 years as a programmer, living in New Jersey, Boca Raton, Florida and Detroit. In 1993, he moved to San Francisco to work for Charles Schwab, where he was introduced to the Internet—which at that time was still relatively free of commercials. A self-professed nerd, he developed Craigslist as a free marketplace where people could come together – without charge – and exchange information. It has been described as an "internet commune."

Newmark was born in Morristown, New Jersey, the son of Joyce and Lee Newmark. Growing up, he attended a Jewish religious school. His father, an insurance salesman, died when Craig was thirteen and his mother struggled financially, moving Craig and his brother Jeff into an apartment in Jacob Ford Village. In 1971, he graduated from Morristown High School and thanks to scholarships, attended college at Case Western Reserve University, where he received a bachelor of science degree in 1975 and a master of science degree in 1977.

Craig Alexander Newmark (born December 6, 1952) is an American Internet entrepreneur and philanthropist best known for being the founder of the website Craigslist.