[3] In the High Middle Ages the village belonged to the Lords of Holderbank and then later to the Twingherrschaft of Wildegg.

Religiously, into the 16th century the inhabitants of Möriken-Wildegg belonged to the parish of Staufberg.

[3] An important factor to the growth of Möriken-Wildegg came in 1858 when a railroad station on the Aarau-Brugg line opened in the village.

It consists of the village of Möriken, Wildegg Castle, the village section of Wildegg (founded in the 18th century), the settlement of Hard and the ferry over the Aare river (replaced in 1870 by a bridge).

The blazon of the municipal coat of arms is Or Moor's Head guardant proper.

[8] The age distribution, as of 2008[update], in Möriken-Wildegg is; 384 children or 9.7% of the population are between 0 and 9 years old and 486 teenagers or 12.2% are between 10 and 19.

[10] About 59.6% of the total households were owner occupied, or in other words did not pay rent (though they may have a mortgage or a rent-to-own agreement).

[8] In the 2007 federal election the most popular party was the SVP which received 40.8% of the vote.

[8] The historical population is given in the following table:[3] Wildegg Castle, the Kestenberg (a Bronze Age hilltop settlement), the Gasthof Bären at Bruggerstrasse 19, Wildegg's Catholic Church of St. Antonius and the houses at Effingerweg 5, 6, 8 are listed as Swiss heritage sites of national significance.

[14] The entire village of Wildegg is designated as part of the Inventory of Swiss Heritage Sites.

[8] From the 2000 census[update], 856 or 25.1% were Roman Catholic, while 1,943 or 56.9% belonged to the Swiss Reformed Church.

[12] Möriken-Wildegg sits on the Baden–Aarau line and is served by trains at Wildegg railway station.

[12][17] The famous U.S. actor Yul Brynner, (July 11, 1920 – October 10, 1985) was a (Swiss) citizen of Möriken-Wildegg, Aarau.

Jules Bryner was born close to Geneva from a Swiss German background.