Neighboring provinces are from the north clockwise Chaco (divided by the 28th parallel south), Corrientes, Entre Ríos, Buenos Aires, Córdoba, and Santiago del Estero.

The 66th parallel south is a circle of latitude that is 66 degrees south of the Earth's equatorial plane, about 61km north of the Antarctic Circle.

The 23rd parallel south is a circle of latitude that is 23 degrees south of the Earth's equatorial plane, about 50km north of the Tropic of Capricorn.

The 25th parallel south is a circle of latitude that is 25 degrees south of the Earth's equatorial plane, just south of the Tropic of Capricorn.

The border - in two sections, along the 49th parallel south of British Columbia and the Alaska Panhandle west of northern British Columbia - has had a powerful effect on the region.

The 24th parallel south is a circle of latitude that is 24 degrees south of the Earth's equatorial plane, about 60km south of the Tropic of Capricorn.

The 1st parallel south is a circle of latitude that is 1 degree south of the Earth's equatorial plane.

The 67th parallel south is a circle of latitude that is 67 degrees south of the Earth's equatorial plane, about 50km south of the Antarctic Circle.

The 79th parallel south is a circle of latitude that is 79 degrees south of the Earth's equatorial plane in the Antarctic.

The 34th parallel south is a circle of latitude that is 34 degrees south of the Earth's equatorial plane.