BOSTON — Gambling companies, organized labor and their supporters have pumped nearly $1.8 million into their political campaign to defeat a November ballot question to repeal the state’s casino law, according to campaign finance reports filed Friday. Anti-casino activists, meanwhile, raised nearly $250,000 during the same reporting period, which ran from Jan. 1 to Aug. 31.

Friday’s filings were the first time the two sides revealed fundraising tallies since the state’s highest court allowed the repeal question on the ballot. If approved, the question would effectively halt the state’s efforts to offer Las Vegas-style gambling.

David Guarino, a spokesman for Repeal the Casino Deal, which successfully petitioned to have the question placed on the ballot, said the group is focused on building a grassroots campaign.

“The out-of-state casino bosses can write big personal checks but they can’t buy facts, they can’t hide the mess they’ve already created here and the job losses, closed business and disappearing revenues we see in Atlantic City, Connecticut and beyond,” he said in a statement.

Justine Griffin, a spokeswoman for the Committee to Protect Massachusetts Jobs, the pro-casino group, said: “A broad cross-section of civic leaders, labor unions and business leaders – including casino operators – have made no secret about their desire to make sure we keep the casino law and protect the 10,000 jobs at stake. We plan to run a vigorous campaign to keep those jobs and recoup the hundreds of millions in revenue that now flows to out of state casinos.”

MGM Resorts International has been awarded the state’s first casino license for its proposed $800 million casino in downtown Springfield, pending the outcome of the vote. Penn National Gaming has been awarded the state’s lone slot parlor license for its $225 million project at the harness racing track in Plainville.