Edith Ritchie and Evelyn “Evie” Middleton were born in 1909 and reached their latest milestone in November last year.
The twins, whose maiden name is Rennie, live together in Bonnyton House care home in Ellon.
Neither of them has ever travelled outside of the UK.
Although not identical, their mother would dress the girls in the same clothes.
After leaving school the pair worked on farms before starting their own families.
Evelyn married William Middleton and had four children, 12 grandchildren, 26 great-grandchildren and three great-great grandchildren.
Edith married Nathaniel Ritchie and had four children, nine grandchildren, 21 great-grandchildren and three great-great grandchildren.
When asked her secret to a long life, Edith said: “Simple living, hard work and a good husband.”
Guinness World Records editor-in-chief Craig Glenday said: “Edith and Evelyn are a remarkable pair.
“When they were born the likes of Mark Twain and Florence Nightingale were still alive and we had yet to conquer the South Pole.
“They’re not just the oldest in the UK, they hold the world title. They’ve clearly benefited from good genes and a solid lifelong friendship that only twins can truly understand.”