Adults living in Lincolnshire with long-term mental health conditions are over 50% more likely to smoke than the wider population, new figures show.
Action on Smoking and Health said the higher prevalence of smoking among those with mental health conditions drives inequalities in life expectancy and general health.
Office for Health Improvement and Disparities figures show that 24.4% of adults with a long-term mental health condition in the NHS Lincolnshire CCG area said they smoked in 2020-21 – up from 23% the year before.
Altogether, 15.1% of adults in Lincolnshire said they smoke.
It meant an adult with a mental health condition was 62% more likely to smoke than the wider population.
Nationally, 14.4% of adults said they smoke regularly, but this rises to 26.3% among those with a mental health illness.
Dr David Crepaz Keay, the Mental Health Foundation's head of applied learning, said giving up smoking is a major goal for people using mental health services but that support to quit is not accessible enough.
Hazel Cheeseman, deputy chief executive of ASH, said the "tragedy" is avoidable and called on the Government to do more to bring down smoking rates among those with mental health conditions.
"With more investment into services and wider policies to reduce smoking, we can bring rates down for people with mental health conditions and everyone else," added Ms Cheeseman.
"The Government pledged to make smoking obsolete back in 2019 – it is past time that we heard how they will do this and address the terrible inequalities caused by smoking for people with mental health conditions."
Stopping smoking is linked to improved mental health, Ms Cheeseman further explained, stating that some conditions such as depression and schizophrenia have been linked to starting smoking.
The figures come after the Government's unveiled its aim to be smoke-free by 2030, meaning fewer than 5% of adults in England will regularly smoke.
Smoking prevalence among people aged over 16 in England has continued to decline throughout the last decade, dropping from 19.6% in 2010 to 14.4% in 2020, separate Office for National Statistics show.
The Department for Health and Social Care said it is "addressing the damaging health implications of smoking right across the country, especially where rates remain high" as it aims to make England smoke-free by 2030.
A spokesperson said the new Tobacco Control Plan – which is informed by an independent review on tackling disparities and will set out how the DHSC will meet the smoke-free target – will be published later this year.
The NHS Long Term Plan commits to delivering NHS-funded tobacco treatment services to all people accessing long term mental health services by 2024.