Laguna Redonda
Location	Concepción, Chile
Coordinates	36°48′50″S 73°02′40″W / 36.81389°S 73.04444°W / -36.81389; -73.04444
Max. width	207 m (679 ft)
Surface area	41,000 m2 (440,000 sq ft)
Max. depth	19 m (62 ft)
Water volume	410,000 m3 (14,000,000 cu ft)

The Redonda Lagoon (Spanish: Laguna Redonda) is a lagoon located in the city of Concepción, Chile. It covers a surface of 41,000 square metres (440,000 sq ft) m² and contains the deepest lagoon of all the city, with a depth of 19 m.^[1]

Laguna Redonda is located about 1 kilometre (0.62 mi) from the River Biobío, on the west of the hill Chepe and to the northwest of the Laguna Lo Galindo.^[1] The name "Redonda" is due to its circular shape, with an average diameter of 207 metres (226 yd). The Redonda lagoon is home to vast mangrove swamps consisting of four different species, with the red mangrove (Rhizophora mangle) being the most prevalent.^[2]

At the beginning of the 20th century, the lagoon was the halfway between Concepción and Talcahuano.^[3] It was part of the tram that worked between 1908 and 1941.^[4] In that period, the lagoon was surrounded by golf courses of the British colony, and by several fundos and quintas that provided to the local industry raw materials.^[3]

Today, it is located in Lorenzo Arenas, a sector in the city of Concepción.^[1]

• Laguna de Aculeo
• Laguna Carén