Wellington Street was named after the Duke of Wellington. It existed as far back as 1838, although at that time it only extended as far east as Milligan Street. In 1894, the section of road continuing north-west of Milligan Street was known as Douro Street, although the name Douro Street for this section of road appears on maps as early as 1855. It is unclear, however, as to when this road extension was actually made, as maps from 1860 still show Lake Irwin with Douro Street and surrounding lots superimposed over it, suggesting the lake was yet to be drained and Douro Street was yet to be constructed.