More than half the population aged three years or older were reported as being able to speak Welsh in 7% of these small areas, down from 9% in 2011.
Nodwyd bod dros hanner y boblogaeth tair oed neu'n hŷn yn gallu siarad Cymraeg mewn 7% o'r ardaloedd bach hyn, i lawr o 9% yn 2011.