Rio Branco is a ceety in Brazil, the caipital o the state o Acre.

Rio Branco
Municipality
The Municipality o Rio Branco
Rio Branco, Tap left:Maternidade Pairk, Tap richt:Mercado Velho (Auld Mercat) theme park, Middle left:JK Brig, Middle richt:A walkway in Passarela Joaquim Macedu theme park, Bottom:Panorama view o Acre River an dountoun Benjamin Constant aurie
Rio Branco, Tap left:Maternidade Pairk, Tap richt:Mercado Velho (Auld Mercat) theme park, Middle left:JK Brig, Middle richt:A walkway in Passarela Joaquim Macedu theme park, Bottom:Panorama view o Acre River an dountoun Benjamin Constant aurie
Banner o Rio Branco
Banner
Official seal of Rio Branco
Seal
Eik-name(s): 
"Capital da Natureza" (Caipital o Naitur)
Location of Rio Branco in the State of Acre
Location of Rio Branco in the State of Acre
Location of Rio Branco
Coordinates: 9°58′29″S 67°48′36″W / 9.97472°S 67.81000°W / -9.97472; -67.81000Coordinates: 9°58′29″S 67°48′36″W / 9.97472°S 67.81000°W / -9.97472; -67.81000
Kintra Brazil
RegionNorth
State Acre
FoonditDecember 28, 1882
Govrenment
 • MayorMarcus Alexandre (PT)
Area
 • Total8835.68 km2 (3,411.48 sq mi)
Elevation
143 m (469 ft)
Population
 (2011)
 • Total319,825
 • Density33.11/km2 (85.8/sq mi)
Time zoneUTC-4 (UTC-5)
Postal Code
68900-000
Area code(s)(+55) 68
Websitewww.riobranco.ac.gov.br