| Official Name: | Campbellville |
| Settlement Type: | Compact Rural Community |
| Etymology: | Named for John Campbell |
| Pushpin Map: | CAN ON Halton#Canada Southern Ontario |
| Pushpin Label Position: | top |
| Pushpin Map Caption: | Location of Campbellville |
| Subdivision Type: | Country |
| Subdivision Name: | Canada |
| Subdivision Type1: | Province |
| Subdivision Name1: | Ontario |
| Subdivision Type2: | Regional municipality |
| Subdivision Name2: | Halton |
| Subdivision Type3: | Town |
| Subdivision Name3: | Milton |
| Established Title: | Settled |
| Established Title1: | Police village |
| Established Date1: | 1914 |
| Established Title2: | Amaglamated |
| Established Date2: | 1974 |
| Population Density Km2: | auto |
| Timezone: | Eastern Time Zone |
| Utc Offset: | -5 |
| Timezone Dst: | Eastern Time Zone |
| Utc Offset Dst: | -4 |
| Coordinates: | 43.4881°N -79.9822°W |
| Coordinates Footnotes: | [1] |
| Postal Code Type: | Postal code |
| Postal Code: | L0P 1B0 |
| Area Code: | 905, 289, 365 |
| Blank Name: | NTS Map |
| Blank Info: | 030M05 |
| Blank1 Name: | GNBC Code |
| Blank1 Info: | FAOED |
Campbellville is a compact rural community in the geographic township of Nassagaweya in the Town of Milton, Ontario. It is on the Niagara Escarpment and is a tourist destination for residents of the Greater Toronto Area.
Campbellville is named for John Campbell, who settled there in 1832. A saw mill was later built. A tavern was opened in 1847 by Mr. Priest. A hotel was also located in the early settlement, which burned down around 1930. The first store and post office were noted in 1849, located in William Campbell's home and operated by Malcolm Campbell.[2]
Campbelleville was incorporated as a police village in 1914.[3]
Campbellville was originally part of Nassagaweya Township, and it was noted in 1932 that Campbellville "was, as it is now, the most important centre" in the township.[2] Nassagaweya Township was part of Halton County until 1974, when the Regional Municipality of Halton was created and the township became part of the town of Milton.
Located in Campbellville are Mohawk Racetrack, a harness racing venue; Crawford Lake Conservation Area, Mennonite furniture shops, an ice cream parlour, and Cristello's Village Market. The world's largest antique leaded stained glass store and museum, The Stonehouse of Campbellville, is also located in Campbellville.
Churches include St. David's Presbyterian Church, founded in 1869. Its current building dates to 1891 with an addition built in 1999. St. David's cemetery dates back to 1908.
The Serbian Orthodox Eparchy of Canada has its episcopal headquarters in Campbellville.[4]