| Official Name: | Palermo |
| Other Name: | Hagartown |
| Settlement Type: | Former hamlet |
| Pushpin Map: | CAN ON Halton#Canada Southern Ontario |
| Coordinates: | 43.4346°N -79.7775°W |
| Pushpin Map Caption: | Location of Palermo, Ontario |
| Subdivision Type: | Country |
| Subdivision Name: | Canada |
| Subdivision Type1: | Province |
| Subdivision Name1: | Ontario |
| Subdivision Type2: | Regional municipality |
| Subdivision Name2: | Halton Region |
| Subdivision Type3: | Town |
| Subdivision Name3: | Oakville |
| Founder: | Lawrence Hagar |
| Established Title: | Established |
| Established Title2: | Renamed |
| Established Title3: | Amalgamated |
| Established Date: | 1805 |
| Established Date2: | 1836 |
| Established Date3: | 1962 |
| Population As Of: | 2006 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Postal Code Type: | Postal code |
| Postal Code: | L6M |
Palermo, founded as Hagartown, is a former hamlet in Halton County (today Halton Region), Ontario, Canada, within the town of Oakville.
The hamlet was located around what is now the intersection of Dundas Street and Bronte Road.[1] The settlement was established in 1805 by Lawrence Hagar, a settler to Upper Canada from Pennsylvania.[2] The village was named Hagartown until 1836 when it was renamed to Palermo in honour of Horatio Nelson, Lord of Palermo.
In 1869, the population was 300.[3] In 1875, the village had an iron foundry, two stores, and a hotel. At that time its population was 150.[4] By the 1870s, the village also had a wagon shop, blacksmith shop, harness shop, brick school house, churches, a telegraph office and drill shed. The village, along with other villages in Trafalgar Township, became part of Oakville in 1962, when the township was amalgamated into Oakville.[5]