Cedar Lake may refer to one of eighteen lakes of that name in Ontario, Canada:
- Cedar Lake in Algoma District, National Topographic System (NTS) Map Sheet 041J10
- In Frontenac County:
- Cedar Lake, NTS Map Sheet 031C08
- Cedar Lake, NTS Map Sheet 031C10
- Cedar Lake, NTS Map Sheet 031C10
- Cedar Lake, NTS Map Sheet 031C14
- Cedar Lake, NTS Map Sheet 031F02
- Cedar Lake in Haliburton County, NTS Map Sheet 031D15
- Cedar Lake in Hastings County, NTS Map Sheet 031C13
- Cedar Lake (Kenora District), NTS Map Sheet 052K03
- Cedar Lake in Manitoulin District, NTS Map Sheet 041I03
- Cedar Lake (Nipissing District), NTS Map Sheet 031L01
- Cedar Lake in Rainy River District, NTS Map Sheet 052C13
- Cedar Lake in Renfrew County, NTS Map Sheet 031F06
- Cedar Lake in Sudbury District, NTS Map Sheet 041P02
- In Thunder Bay District:
- Cedar Lake, NTS Map Sheet 042E14
- Cedar Lake, NTS Map Sheet 041N12
- Cedar Lake, NTS Map Sheet 042C12
- Cedar Lake, NTS Map Sheet 042D15
There is also a lake named Cedar Lakes in Algoma District.