Northern Finland is geographically large and sparsely populated and provision of services for its residents presents a challenge. OYS responds to the challenge by enhancing resource use, developing the division of labour, and increasing co-operation.

• The district consists of 29 member municipalities (blue area)

• about 410,000 inhabitants (740,000 in the treatment area of responsibility of OYS)

• 12 % of Finland's surface area (the treatment area of responsibility of OYS covers 51 %)

• 139,000 patients, 50,000 treatment periods, 630,000 outpatient visits per year

• about 7,000 employees

• operational costs about 655​ million euros per year