Adela of Hamaland (also Adela of Elten) (952 – died after 1021), was sovereign countess of Hamaland in the Netherlands in 973–1021. She was also the regent of Renkum in circa 983–?, likely as regent for her son . Her claim on the county of Hamaland caused a war of succession with her sister Liutgard of Elten, which lasted from 973 until 996. She married count (d. 983) and 995 with count , whom she made her co-regent by marriage.