A casino that opened a year ago at the fading Aqueduct horse racing track in Queens has emerged as the country’s highest-grossing slot parlor, helping to reshape the gambling landscape in the Northeast as patrons chose less opulent, more local casinos instead of traditional gambling meccas in Atlantic City and Connecticut.

The casino, Resorts World Casino New York City, generated nearly $630 million in revenue over the last 12 months from electronic slot machines, more than the slots at any of the 12 casinos in Atlantic City or at Foxwoods or Mohegan Sun in Connecticut. The average income from an electronic slot machine is more than $370 a day, compared with $169 for slots on the Strip in Las Vegas.

The success of the casino, the only one in the five boroughs of New York, suggests that no matter how luxurious the accommodations or exciting the entertainment, nothing appeals more to gamblers than a casino that is nearby. More than 5.6 million people live within 10 miles — a short subway ride or car trip — of the casino, which expects to see its 10 millionth customer by the end of October. At the same time, the runaway success of the casino is also expected to affect how the administration of Gov. Andrew M. Cuomo moves ahead with plans to approve more, larger casinos around the state.

“Convenience and location are the driving factors today,” said William R. Eadington, director of the University of Nevada’s Institute for the Study of Gambling and Commercial Gaming. “If you put a casino in a high-density population like Queens, you’ll do well.”