A more "joined-up approach" is required to meet the needs of an increasingly ageing population, according to Age Concern in Lincolnshire.
The charity said organisations had to work together to provide equal standards of care across the region.
BBC-commissioned research suggests the county has the 15th highest proportion of over-50s in England.
The study, by Experian, looks at how parts of England will be affected by a society which is growing older.
According to the researchers, 41.2% of Lincolnshire's population is over 50, a figure which is expected to rise to 48.1% by 2029.
Richard Barclay, the chief executive of Boston and South Holland Age Concern, said: "We need a shared understanding between those organisations involved in social care that action is needed now.
"It seems like we're always put a sticking plaster on things. We're reactionary rather than proactive.
"We need a proper structure and understanding to take things forward. Organisations which provide care are delivering what they do well, but not linking up very well."
However, he said a step had been taken in the right direction since the formation of the Lincolnshire Older People's Partnership (LOPP).
The group, made up of volunteers, advises the county council and NHS about how deliver health and social care in the county.
Mr Barclay said: "LOPP has proved itself in the past couple of years, and it's integral to the future of care of the elderly.
"As long as we keep it fresh and go away and deliver the objectives at the local level - that's the key."