Lillian Lowe, 103, from Tenby, Pembrokeshire, has only a few dozen friends, mostly family, registered.
But since being dubbed Facebook’s oldest user, she has had 999 friendship requests from around the world.
She said: “They have been very kind and uplifting messages. I can’t reply to them all.”
Ms Lowe is thought to have become the oldest person among Facebook’s 500m users following the death of 104-year-old Ivy Bean, from Bradford, in July.
The retired hotelier and businesswoman says she uses the site about twice a week to keep up to date with family, including two at university in Cardiff.
She said: “I like it very much, to see my grandchildren and speak to them, but it does waste a lot of time.
Good for her!