Mental health charity Mind said England is facing a "mental health pandemic" and called for a stronger Government approach to tackle widening inequalities in care.
Analysis of NHS estimates by the House of Commons Library shows 12.8%% of adult GP patients in Northumberland had a diagnosis of depression in 2019-20 – higher than the 11.5% national average.
The area with the highest rate in the county was Newbiggin where 18.7% of patients were depressed.
At the other end of the sale, the rate in Berwick-upon-Tweed Town, was 5.1%.
Mind said strategic action from the Government is needed.
Vicki Nash, head of policy and campaigns at the charity, said: "This strategy must focus specifically on communities disproportionately affected by the pandemic, address widening inequalities, sort out an underfunded social care system and ensure the education system supports young people’s mental wellbeing.”
New figures from the Office for National Statistics show one in five adults experienced depressive symptoms between January and March – more than double the year before.
Dr David Crepaz-Keay, head of applied learning at the Mental Health Foundation, said: "If we want to reduce those mental health inequalities then we have to start to prioritise actions against some of these social factors.”
The Government says it is providing an additional £2.3bn a year by 2023-24 for mental health services.
A spokeswoman added: “Hundreds of billions have been spent to help those most in need throughout the pandemic, safeguarding jobs and boosting welfare support.”