The current mayor of Viersen is Sabine Anemüller of the Social Democratic Party (SPD) since 2015.

The most recent mayoral election was held on 13 September 2020, with a runoff held on 27 September, and the results were as follows: The Viersen city council governs the city alongside the Mayor.

The most recent city council election was held on 13 September 2020, and the results were as follows: The company Mars Incorporated (chocolate bars) is situated in one of Viersen's industrial districts named Dülken-Mackenstein.

Kaiser's Tengelmann AG [de] (a big supermarkets chain in Germany) had his headquarter in Viersen, until it was closed in 2010.

Cable manufacturer SAB Bröckskes employs 550 people (430 of them in Viersen-Süchteln).