Census data show over 15-hundred people, who lived in the community in 2011, were 65-or-older.
That's a fifth of the town's total population, and up almost half a percentage point from the number of seniors five years ago.
At the other end of the scale, Fort Frances is seeing a decrease in the number of children.
Those under the age of 14 make up over 16 per cent of the population, an eleven per drop from 2006.
Those in the working-age population in Fort Frances - people aged 15-64 - represent 64.5 per cent of the town's residents.
That's up from the 2006 census when 63 per cent of the population was made up of working-age residents.
The median age of Fort Frances was 44 years, two years old than in 2006.
Across the district, 17 per cent of the total population is being identified as 65 or older.
The town of Rainy River saw the number of seniors in its community drop 12 per cent since 2006 while the senior population has increased 3 and a half per cent in Atikokan.
25 per cent of the district's population has been identified as being under the age of 14.
Atikokan saw a 23 per cent drop in this age group, the highest decline in the district.
Rainy River's population is the oldest community with the median coming in at almost 51 years.
Chapple is the young at just over 38 years.
