Trøjborg is delimited by the streets Dronning Margrethesvej, Trøjborgvej and Nordre Ringgade.

In the case of Aarhus, the name is first seen in a document from 1632 mentioning Trøjborgbæk and again in 1758 when a garden called Trøjborg beyond the city gate at Mejlgade was sold.

[4] The neighborhood developed as a working-class district in response to rapid population growth resulting from industrialization in the early 20th century.

The streets in the neighborhood are named after notable Danish naval officers such as Niels Juel, Steen Bille and Herluf Trolle; the main street is named after Danish-Norwegian Tordenskjold.

[7] Trøjborg is characterized from other neighborhoods and districts in Aarhus by a well-developed local community separate from the rest of Midtbyen.