The county's elderly population is predicted to rise
The number of people aged over 65 in Oxfordshire is set to rise by two thirds in the next 20 years, according to a county council report.
It said that by 2031, fewer than half of the county's residents would be of working age, and people over 65 would make up one in five of its population.
The report warned services could become stretched, as a result.
However, it said immigrant workers could help shift the age balance and help fund services.
Areas such as physical and mental health care, transport and housing have been highlighted.
A county conference on the impact of ageing is planned in March.