But there were plenty of opponents, as well, who expressed concerns about social ills and didn't believe proceeds will go to benefit education in the state.
Saeed Roshan, an Iranian immigrant and registered Democrat, said he voted against the gambling question.
"In Iran, the gambler is called the loser," Roshan, of Rockville, said. "The gambling brings the prostitution, brings the thieves."
Maryland became the first state to approve a state's version of the Dream Act by popular vote. Illegal immigrants can pay in-state rates if they attend a Maryland high school for three years and if they or their parents can show they filed state income taxes during that time.
Supporters said helping more people get an education would only make the state stronger and more productive. Opponents said it wasn't fair to people who have worked hard to enter the country legally.
On a separate ballot question, Maryland voters approved the state's congressional redistricting map. It had been petitioned to the ballot by opponents who said it had been gerrymandered to favor Democrats.
Tony Campbell, who helped lead the effort against the map, said his coalition would push next year in the Maryland General Assembly for an independent redistricting process to replace the current method, in which the governor sends a bill to the legislature.
Voters also passed a constitutional amendment requiring elected officials to be suspended from office once convicted of certain crimes and removed automatically if they plead guilty or no contest. That tightens current law, which only removes someone from office at sentencing.