Heartland Payment Systems, Inc. was a Fortune 1000 U.S.-based payment processing and technology provider. Founded by Robert O. Carr in 1997, Heartland Payment Systems is headquartered in Princeton, New Jersey.

Heartland Payment Systems provides payment processing for more than 275,000 business locations in the United States and processes more than 11 million transactions a day and more than $80 billion in transactions a year. In 2014, the Nilson Report ranked Heartland the 6th largest payment processor in the country by transaction count, and the 8th largest by processed dollar volume.[3] On April 25, 2016, the company tweeted an announcement that it had successfully completed a merger with Global Payments Systems.[4]. This wrapped up a process which began with the announcement of Global Payments to acquire the company in December 2015, for $3.5 billion;[5] the transaction was completed in 2016.

In addition to payment processing, Heartland has developed or acquired businesses in payroll processing, gift card and campus card solutions, point of sale systems, school payments and nutrition, network management, mobile payments and ordering, ecommerce, billing solutions, and lending services. Merger with Global Payments Inc. was completed in April 2016 - now publicly traded as NYSE:GPN.

Heartland processed its first card transaction on July 15, 1997. In 2001 the company received a $40 million private equity investment from Greenhill Capital Partners, L.P. (New York, NY), LLR Partners, Inc. (Philadelphia, PA), and their affiliated investment funds. The company went public on the New York Stock Exchange on August 11, 2005. On May 17, 2010, Heartland announced its debut on the list of America’s largest companies at #954.

On January 20, 2009 Heartland announced that it had been "the victim of a security breach within its processing system in 2008". The data stolen included the digital information encoded onto the magnetic stripe built into the backs of credit and debit cards; with that data, thieves can fashion counterfeit credit cards by imprinting the same stolen information onto fabricated cards. One estimate claimed 100 million cards and more than 650 financial services companies were compromised; at the time, it was characterized as the largest ever criminal breach of card data.

An American computer hacker, Albert Gonzalez, was sentenced in March 2010 to 20 years in prison for his role in the hacking ring that broke into the Heartland computer systems.

On May 1, 2009, Visa and Heartland issued a statement that Heartland successfully validated its compliance with PCI DSS and was returned to Visa's list of PCI DSS Validated Service Providers.

On May 24, 2009, Heartland commercially launched their E3 solution, an end-to-end encryption technology designed to safeguard credit and debit card account information from the moment of card swipe and through the Heartland network. Gartner Analyst Avivah Litan stated that Heartland "is basically leading the way for the rest of the industry." She also characterized its plan for end-to-end encryption as the first effort of its kind in the US.

Other processors including Worldpay US and several First Data ISO's announced end-to-end encryption initiatives soon after Heartland announced theirs.

Following a keynote address to the Strategic Leadership Forum of the Electronic Transactions Association in October 2013, Heartland CEO Bob Carr published an open letter to the electronic payment processing industry urging an end to unethical, dishonest and illegal pricing practices, referencing the practice of deliberately falsifying interchange rates, deliberately falsifying merchant category codes (MCC), and the use of confusing small print to extort large fines from merchants.

In January 2014, Heartland filed a lawsuit against the company Mercury Payment Systems, an electronic payment provider, for alleged false advertising and "other deceptive trade practices". The lawsuit concerns interchange fees charged by credit card networks and alleges violations of the Lanham Act and state laws.

In May 2014, Heartland Secure is launched. Backed by a breach warranty, Heartland Secure combines three technologies to provide merchants with security and guard against monetization of stolen card data.

In April 2016, Heartland and Global Payments completed their merger agreement. The combined company, Global Payments Inc., is publicly traded (NYSE: GPN), has more than 8,500 employees worldwide and provides market-leading payments solutions to nearly 2.5 million merchants in 29 countries globally.