Sri Aman was formerly known as Simanggang. Sri Aman means "town of peace" in the Malay language. Sri Aman is famous for the benak, or tidal bore, of the Batang Lupar River. The tidal bore comes in from the river mouth and fills up the river very rapidly in the course of about 10 minutes. The wave crest at Sri Aman is up to 2 to 3 metres high.
Fort Alice, built in 1864, is the oldest heritage building in Sri Aman, constructed following the victory of Rajah Charles Brooke. It served as a defensive structure controlling the Lupar River.