A new report by a cross-party committee of MPs has warned that the Government is "woefully underprepared" for the consequences of a rapidly ageing society.
The committee says that unless the government acts swiftly, the issue could cause a series of crises in society and public services.
Wokingham (172.4%), Maldon (160%) and Surrey Heath (158.8%) are named by the ONS as three areas in the region seeing the largest increase in elderly people.
The biggest rises in the region's populations of over-65s by 2030 are Bracknell Forest (83.9%), and the City of London (83.3%)
A Government spokesman said: "We already have an ambitious programme in place across Government to understand and better meet the needs of an ageing population.
"It is essential that we reform our public services so they can cater for changing demand and are sustainable in the longer-term.
We are making radical changes to our pension system to encourage more people to save for their retirement. We welcome the Committee's report, and will consider its recommendations."