In the Iron Age iron replaced bronze as the most used metal for making weapons, tools and other artefacts.

The early Iron Age, from 500 BC - 400 AC, is the same as Pre-roman and Celtic Iron Age. The early Pre-roman Iron Age was primarily influenced by Celtic tribes from Mid Europe such as Germany. Archaeologists have found traces of the so-called long houses from this time period, which where quite similar to the ones found from the Bronze Age except for the size. The ones from the Iron Age is a bit smaller than the ones excavated from the Bronze Age. 

Early Pre-roman Iron Age is mainly known for moor sacrifices of both items and human sacrifices such as the Hjortspring boat, the Tollund man and the Grauballe man.

In the early- and late-Roman Iron Age, artefacts were traded with the Romans in the South. The period is also known for the silvery sacrifices such as the Gundestrup Kettle, which can be seen at the National Museum in Copenhagen.

The impressive discoveries from the battle at Illerup River-valley (Illerup Ådal) also stems from this time period, where the locals fought for territories in the area of Skanderborg. 

Another finding from the Iron Age is the beautiful silver cups excavated at Hoby. These were made by the Romans and feature drawings of Greek Myths.

Germanic Iron Age - from 400-800 AC

Early Germanic Iron Age, a migration period, covers the first 150 years and the Late Germanic Iron Age the last 250 years. The period is also known as the Golden Age since a lot of golden sacrifices have been found - such as a 10 kilo gold tresure, which was found near Gudme on Funen. The famous Golden Horns, which were found in Southern Jutland, are also from this time period.

In the Germanic Iron Age artefacts were often decorated with beautiful windings and animal ornamentations - a tradition also used in the later Viking silver jewelries.

The migration in Europe was caused by the growing population, and the result can be seen in the present demographics of Celtic blood in countries like Ireland and Scotland. The Germanics were also known as Celtics and they were arch enemies of the Romans.

The Viking Age, which is a part of the Iron Age, started around 800 AC and continued to around 1050 AC. In Denmark, the Iron Age was followed by the Middle Ages.