Pro. 오소르노

Provincial Osorno were founded on 5 June 1983 by a group of amateur football and local authorities, who designed Sergio Toloza as the first Provincial Osorno's Chairman.

In July 1983, the club appointed Juan Soto as manager. Six local amateur players were included in the first squad. Later that year the club played their first official Primera B match against Lota Schwager, at the Estadio Bancario de Osorno (P. Osorno won 2–1).

Two years later the club became very popular, resulting in many home sell out crowds in the Estadio Parque Schott that season.

In their early campaigns Provincial Osorno struggles to show good results on the pitch.

Only in 1990, Provincial Osorno finally won the second division title to win promotion to the Primera Division for the first time, under the direction of manager Guillermo Yavar, but they finished near the bottom of the table and were relegated in 1991.

The return to the second division in 1992 owes a great deal to the appointment of manager Jorge Garcés, who brought new tactics and a new training regime resulting in an impressing campaign that year.

This time the club managed to stay in the top flight until 1998, with regular campaigns, with the exception of 1996, when, under the direction of manager Oscar "Cacho" Malbernat they finished 6th.

In 1999 they won promotion to the Primera Division in a playoff with Cobresal, returning immediately to the Primera B the next year.

Since then, the club struggles to show good results on the pitch with the notable exception of 2003 when they qualified to the Copa Sudamericana, having beating four First Division's teams in a row, only to lose against Universidad Católica on penalties, in the highly controversial second-leg match.

In 2006 the club was turned into a Sports' joint stock company.

On 25 November 2007 P. Osorno were crowned champions of the Primera B 2007, after beating Municipal Iquique 4–0 at Tierra de Campeones Stadium, and returned to the Primera Division for the 2008 season; losing the category that season and returning to the Primera B, again.

In 2010 the club were relegated to the semi-professional third tier Tercera División, after losing the match for the stay with Deportes Copiapó.

In 2012 the club played at the new third level professional league, the Segunda División, from where they were expelled the same year due to financial reasons.

The club were back in 2014, playing at the fifth tier of Chilean football system, the Tercera B, one year later they were promoted to the upper tier, the Tercera División, and in 2016 they were promoted again, this time to the third tier Segunda División, just to be relegated back to the fourth level Tercera División, were they played from the 2018 until the 2022 season, when they gain promotion to Segunda once again.