More than 1400 volunteers contributed nearly 13,000 hours to council-managed activities in 2019/20.
The 2016 Census found more than 25 per cent of the Mountains population reported doing voluntary work, compared with 16.7 per cent for Greater Sydney.
"The Blue Mountains is incredibly fortunate to have so many dedicated volunteers and a number of council programs could not be provided without the generous support of volunteers," said the mayor, Mark Greenhill.
"Volunteers contribute immeasurably to our community and their efforts are felt everywhere across our city - from the weekend sports fields, to our vibrant cultural spaces, and deep within our world heritage listed wilderness. Some support people in their time of need, while others preserve our unique heritage.
"However you choose to give your time and expertise, we thank you. Your generosity and altruism makes the Blue Mountains a better place for all of us to live, work and visit."
Council offers a wide variety of volunteering opportunities in diverse fields including arts and culture, community services and natural environment, through groups including bushcare, remote bushcare, swampcare, landcare, trackcare, bush backyards network and Blue Mountains Graffiti Alliance.
There are also volunteer programs at council facilities including Braemar Gallery, Blue Mountains Theatre and Blue Mountains Cultural Centre.
Council provides training and support for volunteers to ensure they have the skills and confidence to safely perform their chosen roles.
During 2019-20, council provided free training for community volunteers to support their work with not-for-profit organisations, such as neighbourhood centres and homelessness support services, and to enhance their skills in working with vulnerable people in our community.
"Council recognises the contributions of our volunteers through special events and access," said council's chief executive officer, Dr Rosemary Dillon.
"Our cultural centre volunteers receive invitations to public programs such as artist talks and performances, as well as programs specifically for our volunteer team including preview openings. Council normally hosts an annual bushcare picnic to celebrate the hardworking bushcare volunteers."
Council provided swim passes to volunteers who helped in last summer's bushfires in the Mountains.
"Volunteers also experience personal benefits including being part of a team, gaining new skills and experiences, making new friends, having fun and connecting with like-minded people," said the mayor.