Ko Savai'i te motu nui rawa atu i te whenua katoa. E ai ki te whakataukī o reira, ko Savai'i 'te wairua o Hāmoa'. 43,103 (2006) ngā tāngata e noho ana i reira. Ehara i te tino nui ngā tāone i Savai'i; he kāinga rīriki noa iho te nuinga. Kei Upolu, he motu anō, ngā tāone nunui. E rua herenga kaipuke i Savai'i, ko Salelologa te tāone nui o te motu me Asau tētehi.