Riedern is a former municipality in the canton of Glarus in Switzerland. Effective from 1 January 2011, Riedern is part of the municipality of Glarus.

Riedern is first mentioned in 1350 as Riedern.

Riedern has an area, as of 2006, of 1.5 km (0.58 sq mi). Of this area, 23.8% is used for agricultural purposes, while 53.6% is forested. Of the rest of the land, 13.2% is settled (buildings or roads) and the remainder (9.3%) is non-productive (rivers, glaciers or mountains).

Riedern is at the entrance to the Klöntal and is north-west of Glarus.

Riedern had a population (as of 2010) of 734. As of 2007, 16.3% of the population was made up of foreign nationals. Over the last 10 years the population has grown at a rate of 13.8%. Most of the population (as of 2000) speaks German (82.3%), with Italian being second most common ( 8.4%) and Turkish being third ( 4.5%).

In the 2007 federal election the most popular party was the SPS which received 49% of the vote. Most of the rest of the votes went to the SVP with 39.6% of the vote.

About 62.4% of the population (between age 25-64) have completed either non-mandatory upper secondary education or additional higher education (either University or a Fachhochschule).

Riedern has an unemployment rate of 2.31%. As of 2005, there were 12 people employed in the primary economic sector and about 5 businesses involved in this sector. 41 people are employed in the secondary sector and there are 7 businesses in this sector. 35 people are employed in the tertiary sector, with 13 businesses in this sector.

The historical population is given in the following table:

year	population
1777	102 Adult Males
1850	341
1900	556
1950	660
2000	622
2005	740