Central Park, Itter Park and Manor Farm Park in Eye have all been confirmed as having retained the much sought-after honour.
For Central Park, it is the 18th consecutive year that the park has held the award.
Peterborough Crematorium has also retained a Green Flag Award, having held the accolade since 2009.
The international accolade, now into its third decade, is a sign to the public that the space boasts the highest possible environmental standards, is beautifully maintained and has excellent visitor facilities.
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Councillor Marco Cereste, Peterborough City Council’s cabinet member for waste, street scene and the environment, said: “We are absolutely delighted that three of our parks have retained this prestigious award and everyone involved in their upkeep should rightly feel proud.
“We are committed to creating a greener city and know how much quality green spaces matter to residents and visitors. These awards celebrate the dedication that goes into maintaining the parks to such a high standard, so on that note I’d like to thank our teams for their continued sterling work.
“Everyone knows that a Green Flag award marks out a park or open space as being of the highest quality. It is quite an honour and we will continue to maintain all our parks to the highest standards.”
Paul Todd, Green Flag Award Scheme Manager, said: “Parks and green spaces have never been more important for the physical and mental health of everyone.
“All the research shows that spending time in good-quality green space can improve people’s health and wellbeing, that is why it is important that they are managed to the recognised standard of the Green Flag Award. This is now something that millions more recognise after the challenges of the past six months. All those involved in the Green Flag Award should be congratulated on their achievement.”