Dawn-Euphemia is a township in southwestern Ontario, Canada, in Lambton County.

Residents primarily are employed by the agricultural industry, or by local industries such as Union Gas distribution centre, along with various smaller agricultural manufacturers or service providers.

Students attend secondary school in nearby Petrolia and Dresden, both of which serve as local service centres for residents.

The township comprises the communities of Aberfeldy, Aughrim, Beaver Meadow, Bentpath, Cairo, Cuthbert, Dawn, Dawn Valley, Edys Mills, Florence, Garville, Huffs Corners, Langbank, Oakdale, Rutherford and Shetland.

The Western Ontario Pacific Railway was constructed through the southeastern corner of the township in 1890.