But that support is driven by Michiganders 65 and older, not those with school-aged children, said Richard Czuba, president of Glengariff Group Inc., which conducted the poll.
Almost 56% of parents with kids in school now oppose a vaccine mandate, while 65% of those without children of that age supported such a rule.
"A lot of these parents are under the age of 50. That is the cohort, the 30-50 cohort, that tends to be more conservative than the state as a whole," Czuba said.
"Of those voters over 65, 81% of them support student vaccinations. And part of it is they come from an era, they lived through polio, they lived through measles. And they know exactly what that did to protect them ... but you start getting to the political war when you drop down to those voters under the age of 50."
More than 37% of those surveyed thought parents should have the power to decide whether their kids wear a mask to school. However, 21.5% said local health departments should make the choice, 14% favor a statewide decision and 13.7% thought individual school districts should have the final say.
That means approximately half of those polled thought a governmental entity should make the call on masking in schools. But it also shows the varying opinions on whether to enact the public health measure.
"So the bottom line is, vaccinated voters support vaccine requirements by about a 2-1 margin. But amongst those voters, there is an acknowledgment that it is an individual choice and that is particularly among Republicans and Independents who are vaccinated," Czuba said.
"Where the narrative changes is around masks. There is strong, majority supports for masks ... with only those who are unvaccinated opposing them."
The poll surveyed 600 Michigan voters between Aug. 20 and Sept. 4 and has an overall margin of error of plus or minus 4 percentage points. Of those surveyed, 223 had school-aged children. With a smaller sample size, the poll findings for this group of respondents has a margin of error of plus or minus 6.5 percentage points.
The poll was conducted before Biden announced his broad plan to require businesses with more than 100 people to require employees be vaccinated or submit to weekly COVID-19 testing.