On Census day 2021, 2.3 million people (89.4% of the population aged 16 years and over) described themselves as “Straight/Heterosexual”.
Ar ddiwrnod Cyfrifiad 2021, disgrifiodd 2.3 miliwn o bobl (89.4% o’r boblogaeth 16 oed a hŷn) eu hunain fel Syth/Heterorywiol.