Horsham's population had reached 6,388 in 1947 and so it was declared a city on 24 May 1949.
In 1950 Horsham celebrated its Centenary with a parade through the city.
But then tragedy struck on 24 February 1951 when a train and bus collided at a level crossing on Dimboola Road, resulting in 11 deaths.
The Horsham Streetscape was dramatically remodelled in the 1960s when planning laws were changed and shopfront verandahs were removed from the Post Office, The Bull and Mouth, and The White Hart pubs.
The Horsham City council installed the first parking meters on Firebrace Street in 1963.
A major fire damaged the new State Public Office on McLachlan Street in 1971.
In 1995, the Rural City of Horsham was formed through the amalgamation of the Horsham City, Wimmera and Aprapiles Shires.
Horsham was then named Australia's Tidiest Town in 2001 and was also named Victoria's tidiest town in 2015.

The Black Saturday bushfires of 2009 affected Horsham, with 5,700 ha (14,000 acres) area burnt around the city's fringe including the golf club and eight homes destroyed in the Haven area.
Horsham experienced significant flooding in successive years in 2010 and 2011 Victorian floods.
During these events, the Wimmera reached 3.32 m and 4.71 m respectively.
The 2011 event was particularly severe with the Wimmera River reaching a record peak; over 1,000 residents were evacuated as flood waters divided the city and damaged 600 houses pushing up to a metre of water into parts of the CBD.
Horsham's population had reached 6,388 in 1947 and so it was declared a city on 24 May 1949. In 1950 Horsham celebrated its Centenary with a parade through the city. But then tragedy struck on 24 February 1951 when a train and bus collided at a level crossing on Dimboola Road, resulting in 11 deaths. The Horsham Streetscape was dramatically remodelled in the 1960s when planning laws were changed and shopfront verandahs were removed from the Post Office, The Bull and Mouth, and The White Hart pubs. The Horsham City council installed the first parking meters on Firebrace Street in 1963. A major fire damaged the new State Public Office on McLachlan Street in 1971. In 1995, the Rural City of Horsham was formed through the amalgamation of the Horsham City, Wimmera and Aprapiles Shires. Horsham was then named Australia's Tidiest Town in 2001 and was also named Victoria's tidiest town in 2015.
The Black Saturday bushfires of 2009 affected Horsham, with 5,700 ha (14,000 acres) area burnt around the city's fringe including the golf club and eight homes destroyed in the Haven area. Horsham experienced significant flooding in successive years in 2010 and 2011 Victorian floods. During these events, the Wimmera reached 3.32 m and 4.71 m respectively. The 2011 event was particularly severe with the Wimmera River reaching a record peak; over 1,000 residents were evacuated as flood waters divided the city and damaged 600 houses pushing up to a metre of water into parts of the CBD.
Horsham, Victoria