Holt Country Park was joined by Sadler’s Wood, just outside North Walsham, when it achieved a Green Flag in 2012, and then by Pretty Corner Woods the following year.
All three are run by North Norfolk District Council, with part of Pretty Corner Woods run by the Woodland Trust.
Cllr Maggie Prior, NNDC Cabinet Member for Leisure and Culture, said: “We are delighted that all three sites have retained their hard won status.
“A lot of hard work goes into making sure these beautiful places stay both welcoming and in excellent condition.
“Don’t forget that we also organise events at these locations, so you can choose to visit any one of the three as part of an organised event or in your own time.”
The award, organised by Keep Britain Tidy, recognises and rewards the best parks and green spaces across the country. A Green Flag flying overhead is a sign to visitors that the space boasts the highest possible standards, is beautifully maintained and has excellent facilities.