Government figures show the resort has the most pregnant smokers per head of population.
Blackpool Council said smoking levels in the town had fallen from 33% five years ago to 27.2% now.
In 2013, it won an award for its work tackling the issue of smoking by expectant mothers.
Current NHS data shows the rate of smoking throughout pregnancy in Blackpool was more than 10 times that in Westminster (2.1%).
Blackpool Councillor Eddie Collett, the Cabinet member for health and wellbeing, said: "In Blackpool, smoking in pregnancy numbers are falling. We have seen significant improvement since 2010."
He said they needed to continue the positive work to ensure mothers and babies were protected from harm caused by smoking.
"There is still a way to go," he added. "However, I am pleased that we are moving in the right direction."
He said there were close links between maternity services and support services.
Two years ago Blackpool received an award on smoking cessation from the Clear Partnership, which works with local authorities and is supported by charities such as Action on Smoking and Health (Ash).
Hazel Cheeseman, director of policy at Ash, said the data came from the government's Smoking at the Time of Delivery data.
She said it was unfair to single out Blackpool as they have done some "great work" and one of the reasons the figures may seem higher is because they are so good at recording the data and "not every other part of the country is quite as scrupulous."
She added there are lower rates of smoking in more affluent areas and higher in areas that are less affluent, and although Blackpool has invested a lot they "have such a mountain to climb,"
At the time of the award, Cancer Research UK's Tobacco Control lead, Alison Cox, said: "Blackpool's excellent work will ensure that more pregnant women get the help they need."

Cambridge Assessment, which owns OCR, hopes for "millions of questions", with the best appearing on exam papers in England within the next five years.
OCR would check all questions to see they are of the right standard.
But there are concerns these "crowdsourced" exam questions could give some pupils an unfair advantage.
Cambridge Assessment research director Tim Oates told the TES: "Really interesting questions which - put to children - encourage them to think hard, to integrate things, to understand things and challenge their ideas a bit, are really important.
"We don't think we should necessarily just commission those through asking a limited number of people.
"We want to know what questions teachers ask in the classroom and whether they were good for unlocking that bit of thinking or revealed that misconception."
Currently, exam papers are drawn up by exam committees made up of teachers with detailed knowledge of each subject.
Plans are at an early stage of development and would need to be approved by the exams regulator Ofqual in order to go ahead.
However, Mr Oates said: "I can see within three to five years' time we might be able to start doing some work [with crowdsourced questions] in formal examinations."
OCR said questions would have to go through technical and tough quality assurance processes before being used in a real exam.
The questions submitted by teachers would also be made available to other teachers online through a question bank, so that they could be used in the classroom.
School leaders and assessment experts have welcomed the idea of an online question bank for teachers.
Malcolm Trobe, interim general secretary of the Association of School and College Leaders, said: "The only potential weakness I can see in the system is, if I'm sending in questions and using the same questions in preparation for the examination, if they then turn up on the exam paper it advantages those youngsters because they're seeing a question they're familiar with.
"You're going to have to find a way of overcoming that."
But Mr Oates said schools already guessed exam questions and prepared pupils for likely questions using past papers.
He said the "crowdsourcing" approach would not create unfairness because there would be so many questions in the pool that teachers would have little incentive to drill pupils for any particular question.
OCR and Cambridge Assessment are already working on a project to crowdsource questions from computing teachers, which will be available to other teachers to use in classroom-based assessments.
A councillor in Blackpool, which has England's highest smoking rate among pregnant women, has defended the town's record.
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Teachers are to be asked to submit challenging GCSE and A-level exam questions by a key exam board, the Times Educational Supplement reports.