North Wales Police were concerned for Joshua Parry, 11, and his nine-year-old brother Huw who were last seen late in the afternoon.
The brothers had been last seen on the Gaerwen Industrial Estate area, near Llangefni.
But after a plea on social media, the police confirmed in a statement at 21:20 GMT that the boys had been "located safe and well."
Two young brothers who went missing on Anglesey on Friday have been found.