Samaritans need 30 more city volunteers.
Volunteer numbers have hit their lowest point for more than 25 years.
The call came as the charity launched a nationwide campaign for volunteers, which have dropped by almost 1,000 in just two years.
The Samaritans claim that Britain has become a more "cynical" nation and people have less time to devote to others because of the pressures of combining family and working life.
Last year the Samaritans had 18,700 volunteers, compared to 19,500 in 1999. Numbers are now at their lowest since 1975 and the charity needs 2,000 new volunteers to keep up with demand.
Calls to the charity's 24hour helpline have risen by 4% to 4.7 million over the last year.