| Bayham | |
| Official Name: | Municipality of Bayham |
| Settlement Type: | Municipality (lower-tier) |
| Motto: | Opportunity is Yours |
| Flag Size: | 120x100px |
| Mapsize: | 200px |
| Pushpin Map: | Canada Southern Ontario |
| Pushpin Map Caption: | Location in southern Ontario |
| Pushpin Label Position: | top |
| Coordinates: | 42.7333°N -127°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Type2: | County |
| Established Title: | Settled |
| Established Date: | 1800s |
| Established Title2: | Incorporated |
| Established Date2: | January 1, 1850 |
| Leader Title: | Mayor |
| Leader Name: | Edward Ketchabaw |
| Leader Title1: | Federal riding |
| Leader Title2: | Prov. riding |
| Area Land Km2: | 244.97 |
| Population As Of: | 2016 |
| Population Footnotes: | [1] |
| Population Total: | 7396 |
| Population Density Km2: | 30.2 |
| Utc Offset: | -5 |
| Utc Offset Dst: | -4 |
| Postal Code: | N0J |
Bayham (2011 Population: 6,989) is a municipality in the southeast corner of Elgin County, Ontario, Canada. It is south of the town of Tillsonburg and Oxford County.
Bayham was named in 1810 for Viscount Bayham Charles Pratt, a friend of land grant recipient Colonel Talbot. The township was incorporated on January 1, 1850. The villages of Port Burwell and Vienna were incorporated as separate municipalities and separated from the township in 1949 and 1853 respectively.
In 1998, Bayham was re-amalgamated with Port Burwell and Vienna and Eden to form an expanded Municipality of Bayham.
The municipality comprises the communities of Corinth, Eden, Froggetts Corners, North Hall, Port Burwell, Richmond, Springer's Hill, Straffordville, Vienna and Wadger.
In the 2021 Census of Population conducted by Statistics Canada, Bayham had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of 244.6km2, it had a population density of in 2021.[2]