The discovery was made at a property in Woodlawn Park Grove, Firhouse, Dublin, at lunchtime yesterday.
Gardai said the woman's body was found at the address and emergency services were called at 1.30pm.
The body has been taken to Tallaght Hospital, where a post-mortem examination will be carried out today.
Gardai in Rathfarnham are investigating and the house has been sealed off.
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