There were 81 teachers in Calderdale on long-term stress leave in 2016/17.
It means one in twenty-seven local teachers has been off work for longer than a month with stress in the past year.
The Liberal Democrats have said the figures "laid bare the impossible pressures teachers are under" and warned that stress caused by an obsession with exam results is fuelling the teacher recruitment crisis.
In total 6294 days have been taken off by local teachers for stress and mental health reasons in the previous year.
The figures are based on responses to Freedom of Information requests by the Liberal Democrats.
Councillor James Baker commented:
“These figures lay bare the impossible pressures our teachers are being put under.
“It is simply unacceptable that those working tirelessly to do the best for local children are seeing their mental ill-health affected as a result.
“This must be a wake-up call to us all as to the stressful environments we have now created within our schools. This can only be having a detrimental impact on the well-being of teachers and pupils alike.
"Stress and anxiety are fuelling the teacher recruitment and retention crisis, but the government’s current approach is making matters worse.