Since the 2015 census, Arorae is the less populated island of the Republic of Kiribati but Banaba and Canton Island. The population at the November 2020 census was the lowest ever, 983 inhabitants from 208 households. The population at the previous 2015 census was 1,011, most of whom (98.5%) are Protestants of Kiribati Uniting Church (KUC) and all of them are I-Kiribati (no declared mixed races or others). During the 2010 census, there were only 2 foreign citizens. In the Republic of Kiribati, 25% of the people identifying as “from Arorae” (4,190) live in Arorae: 1,061 live in Arorae, 2,142 live in South Tarawa and 987 in outer islands. 216 people living in Arorae are not “from Arorae” (2010). At the first census after WWII, in 1947, 1,558 people lived in Arorae; in 1963, 1,760; in 1968, 1,830, the highest population ever; in 1973, 1,626; in 1978, 1,527; in 1985, 1,470; in 1990, 1,440; in 1995, 1,248; in 2000, 1,225; in 2005, 1,256; in 2010, 1,279 — 134 h/km2.