Data from the Office of National Statistics shows that East Lindsey has the highest population percentage of elderly residents with 21.4%.
Lincolnshire has an elderly population of 755,833, while neighbouring North Lincolnshire has 172,005 and North East Lincolnshire 159,821.
It comes as the government asked vulnerable people, which includes some over the age of 70, to stay at home and avoid face to face contact for 12 weeks.
The measure is estimated to have affected around 1.5 million people in the UK.
Now, the most recent percentage data from the ONS has revealed the estimated numbers of over 70s in Lincolnshire.
Boston, Population 69,366 – 15%
Lincoln, Population 99,039 – 10.8%
East Lindsey, Population 140,741- 21.4%
North Kesteven, Population 115,985 – 17.3%
South Holland, Population 93,980 – 17.8%
South Kesteven, Population 141,853 – 16.4%
West Lindsey, Population 94,869 – 17.5%
North East Lincolnshire, Population 159,821 – 14.7%
North Lincolnshire, Population 172,005 – 14.8%
It comes as the government has stepped up its measures to prevent COVID-19 from spreading.
Prime Minister Boris Johnson placed the country in lockdown on Monday for three weeks in an effort to prevent the spread of coronavirus.
So far, yesterday (Wednesday) the UK’s death toll for patients who tested positive for the virus stood at 422.
The amount of confirmed cases of COVID-19 increased by more than 1,400 in a single day to 8,077.
In Greater Lincolnshire, the number of positive cases stood at 36. 28 have been confirmed in Lincolnshire, five in North Lincolnshire and three in North East Lincolnshire.
Meanwhile, hospital bosses said at least nine COVID-19 patients are being treated at Lincoln County Hospital and Boston Pilgrim Hospital.