The phrase "although a poll on" is correct and usable in written English.
It can be used when introducing a contrast or exception related to a poll or survey topic.
Example: "Although a poll on public opinion showed support for the initiative, many community members expressed concerns."
Alternatives: "even though a survey about" or "despite a poll regarding".
No message boards on the subject of the merger appeared there last week, although those interested could vote in a poll on whether or not it was good for the Internet.
A poll on Tuesday showed Trump closing the gap with Clinton, although other surveys have been more unfavorable for him.
Although a PPP poll on Monday gave Romney a 15% lead, the two had been close in earlier polls.
Although a poll published late on Saturday night showed voters sticking to their pre-Brexit preferences, some – not least the leaders of the big four parties – had predicted that the UK referendum would have an impact.
The smattering of new statewide polls released over the last few days yields no new significant trends, although a new poll on the West Virginia Senate race shows the Democrat, Joe Manchin, maintaining narrow but consistent lead over Republican candidate John Raese in September.
And although a poll indicates that Republicans are showing an increased voting enthusiasm, that doesn't necessarily indicate a decrease in political enthusiasm on the left.
Although a new Washington Post poll on the Washington Redskins name shows that nine out of 10 Native Americans say they do not find it offensive, it still provokes strong feelings and beliefs from both sides.
So it is not just about questions that "push" respondents one way or another, not just about being negative, not even about lying (although lying on a poll is certainly an ethical transgression).
In 1975, pollster Peter Hart did a major poll on the issue, although I thought that some of the other questions focused on unrealistic possibilities.
