Her family are affectionately calling her the Queen of Queensland and it is not hard to see why.

Celebrating her 109th birthday, Mabel Crosby reigns as the state's oldest resident and fourth oldest person in Australia.

Ms Crosby marked the milestone with friends, family and fellow residents at TriCare Sunnybank Hills on Friday.

Mabel Crosby celebrated her 109th birthday today. (9news)

"It's beautiful. Lovely to see everybody," Ms Crosby said.

The family's matriarch has 4 children, 10 grandchildren, 20 great grandchildren and 6 great great grandchildren, all with stories to share.

"She was 100 at the time and I said, 'You don't have to mow the lawn, I'll come down tomorrow'," her daughter, Robyne Bamberry said.

"Well, when I got down there she had got up earlier and done it before me, to prove she could do it."

Ms Crosby was born in England on September 7 in 1909.

Mabel ran a farm with her husband and children, working on the land. (9news)

Her family moving to Australia when she was four years old, buying a farm near Newcastle.

"We had miles to walk to school, through the bush. That sort of thing. That all goes to strengthen you, I reckon," Ms Crosby said.

After school, Ms Crosby worked as an apprentice dress maker, before getting married.

Her husband bought a farm near Narara, north of Sydney.

"It was feeding chooks and cleaning eggs and we had cows, and dogs, and all the rest of it. Grew our own vegetables," her daughter said.

Mabel has four children and many grand children and great-grandchildren. (9news)

The couple had four children.

Their only son, Stu, lost his eye-sight at the age of 21.

"They went to blind bowls together, did everything together. Wherever mum went, Stu went and visa versa," her daughter said.

Ms Crosby has outlived both her husband, who passed away in 1970, and her son, who died in 2010.

She said the secret to living a long life is staying active.