The poll also found that more than 80% of people in the 40 most marginal Conservative/Labour seats also support a rise.
Midwives in England voted in favour of industrial action in a ballot that ended last week, with a walk-out scheduled for 13th October.
More than four-fifths (87%) of Labour MPs who responded support a pay rise, with a majority (58%) of Conservative respondents also supporting the rise. Very few opposed the suggestion – just 15%, and only 6% opposed it greatly.
The poll will add weight to the RCM’s belief that the UK government was wrong to reject a recommendation by independent NHS Pay Review Body for a 1% increase for all NHS staff.
More than four-fifths of people (83%) in the marginal seats polled supported the increase, while 81% say that they would support a midwifery pay rise at least in line with inflation.
There is also high support (65%) among the public in these seats for midwives’ industrial action as a sign of protest against the decision not to increase their salaries by 1%.
Cathy Warwick, chief executive of the RCM, said: “After their historic vote to take strike action, our midwives will be reassured by this further vote of confidence from the public. They will also take to heart the fact that MPs support the recommended modest pay rise for NHS staff.
“That so many Conservative MPs are in favour of the pay award that has been rejected should sound alarm bells at the highest level. We really do want to get back to talking about this with the government. The truth is investing in staff leads to good outcomes for the people the NHS serves and this is something we all want.
“The Pay Review Body said that this pay increase is affordable for the NHS. Midwives and other NHS staff certainly deserve this very modest pay increase and the public support them in this also.”