Lonsdale Street is a main street and thoroughfare in the city centre of Melbourne, Australia. It runs roughly east-west and was laid out in 1837 as one of Melbourne's original boundaries within the Hoddle Grid. The street extends from Spring Street in the east to Spencer Street in the west.
Lonsdale Street is home to multiple office buildings, churches, restaurants and shopping centres. Its most famous function is housing the State of Victoria's legal precinct and courthouses. The street is also named for Melbourne's first magistrate, William Lonsdale.