The town was named after Charlotte (née Harlin), wife of John Dunn Moore of the Colinton pastoral property. Their son
William John Harlin Moore was a
Member of the Queensland Legislative Assembly. Harlin Provisional School opened in 1908. On 1 January 1909, it became Harlin State School. The town was marooned during the
2011 floods. Over 40 travellers were stranded by the dangerous and rising flood waters of the Brisbane River and the Ivory and Maronghi Creeks. They were housed by the publicans and owners of the Harlin Hotel and the Caltex service station from 9 January 2011, until the flooded creeks and rivers subsided. == Demographics ==