Massachusetts voters are interested in lowering the 6.25 percent state sales tax, a new poll from WBUR/MassINC Polling Group shows.

Asked whether they support or oppose lowering the tax rate to 4.5 percent, 62 percent said they back lowering it.

Among those who said they backed a decrease, 38 percent said they "strongly" support it while 24 percent said they "somewhat" support it.

The opposition totaled 28 percent in the poll. Seventeen percent they "somewhat" oppose such a proposal while 11 percent said they "strongly" oppose it.

Nine percent said they don't know or refused.

The proposal could end up on the November 2018 ballot, possibly next to a proposal to increase the state income tax on any income over $1 million. (Voters told WBUR/MassINC they largely support that proposal, which would amend the state constitution, too.)

The survey, which took place June 19 to June 22, included 504 registered Massachusetts voters. The margin of error is 4.4 percentage points.

Beacon Hill lawmakers in 2009 increased the state sales tax to 6.25 percent from 5 percent.

The Retailers Association of Massachusetts, a business trade group, said earlier this year the lower sales tax ballot question is one they're considering.

In a June 22 message to members, the association's president, Jon Hurst, said the board of directors has authorized his staff ot conduct legal and voter research on such a measure.

"Perhaps you are a restaurant, food store, or service station, and don't compete to the same degree with the price advantages and convenience of the internet, or with those sellers north of the border," he wrote. "But we must focus on the fact that for all of our members, the government incented shifting of tens of billions of consumer dollars out of Massachusetts means investment, overall spending and economic growth are dramatically slashed, and jobs are killed as dark store fronts proliferate in our communities."