The serious assault occurred on Monday evening.
A man is due in court today charged with assaulting a pensioner at a care home in Westmeath.
The woman, who is in her 80s, was seriously assaulted at the home in Athlone on Monday evening, when a man used a back door to gain entry.
Staff were alerted by noises and interrupted the assault.
The woman is receiving treatment for non-life-threatening injuries at the Midlands Regional Hospital Tullamore.
A man aged in his 50's was arrested by Gardaí at the scene.
He is due before Athlone District Court this morning.