Areas protected to preserve their ecological systems. It may also happen that a Reserve becomes a protected area of a neighboring National Park, when it is an independent conservation area that does not meet all the necessary requirements to become a National Park.

• Lann Lacar Area, Ruca Choroi Area, Malleo Area National Reserves (Neuqun): 184400 ha.
• Nahuel Huapi Central Area, Gutirrez Area National Reserves (Neuqun and Ro Negro): 337800 ha.
• Los Alerces National Reserve (Chubut): 75500 ha.
• Puelo, Turbio Area, Northern Area National Reserves (Chubut): 9600 ha.
• Los Glaciares, Central Area, Viedma Area, Roca Area National Reserves (Santa Cruz): 145100 ha.
• Laguna Blanca National Reserve (Neuqun).
• Perito Moreno National Reserve (Santa Cruz): 30500 ha.
• Magallanes Peninsula Provincial Reserve (Santa Cruz): 40000 ha.
• San Lorenzo Provincial Reserve (Santa Cruz)
• Penguin Island Provincial Reserve (Santa Cruz)
• San Julin Peninsula Provincial Reserve (Santa Cruz)
• Cape Vrgenes Provincial Reserve (Santa Cruz)
• Valds Peninsula Provincial Fauna Reserve (Chubut)
• Punta Pirmide Natural Reserve (Chubut)
• Punta Norte Natural Reserve (Chubut)
• Punta Delgada Natural Reserve (Chubut)
• Punta Tombo Natural Reserve (Chubut)