Daybell is a surname. Notable people with the surname include:
Kim Daybell (born 1992), British tennis player Chad Daybell (born 1968), American author from Idaho convicted of murder and conspiracy to commit murder in the deaths of his first wife and his second wife's children Lori Vallow Daybell (born 1973), American woman from Arizona convicted of murder and conspiracy to commit murder in the deaths of her husband, her children and her next husband's wife