Start with a lake guide, or search more lakes above.
Lake Muskoka
Big-lake boating, island cottages and sandy public beaches. Lake Muskoka has both road-access and boat-access properties.
Lake of Bays
Cottage country around Dwight, Dorset and Baysville, with village stops and a public beach at Dwight.
Kawagama Lake
Road-access and boat-access cottages across Algonquin Highlands and Dysart, with public boat access at Fletcher Bay.
Lake Kashagawigamog
A connected lake near Haliburton and Minden, with boating routes into a five-lake chain.
Buckhorn Lake
Lake cruising beside Buckhorn village, with Lock 31 connecting trips along the Trent-Severn Waterway.
Stony Lake
Mainland and island cottage options in the Kawarthas. Listings and maps may spell the name Stony or Stoney.
Big Rideau Lake
A boating destination in Rideau Lakes, with a village harbour and public beach at Portland.
Newboro Lake
Cottage life beside Newboro’s canal village, municipal harbour and Rideau Canal lockstation.
Kennisis Lake
Big Kennisis is one of two neighbouring lakes in the Haliburton Highlands, beside Haliburton Forest.
Little Kennisis Lake
The smaller of the two Kennisis lakes, sharing a cottage association and the Haliburton Forest setting with Big Kennisis.
More lakes: water records only 1,932
These lakes have testing records, but no written lake guide yet.
Swimming, weeds and the lake bottom
A clear lake can still have plenty of plants. Shelter from waves, the lake bottom, water depth and season all affect a particular shore. Check the swimming area during late summer, ask for seasonal photographs and look at the nearest monitoring sites.
For swimming advice, use current local public-health notices. These historical water records do not test for bacteria or guarantee safe water.
Plants at the waterfront
Use the lake bottom, slope and shelter from waves to assess a specific shoreline.
Algae & current advice
Check Ontario’s bloom guidance and the local public health unit before relying on the water.
Fish, depth maps and public access
Ontario’s Fish ON-Line includes species records, depth contours where available, access points and fishing rules. Match the lake and location before using a map.
Open Ontario’s fishing and lake-map guideA public launch does not establish overnight parking or private docking rights.
How many homes are on a lake?
We show a count only when a source identifies what was counted and when. Homes, vacant lots, association members and surveyed shorelines are different things. Some lake plans contain useful historical inventories; a current count is often unavailable.
Look for dated counts on the Kennisis, Little Kennisis and Lake of Bays guides. Where source figures conflict, the lake guide says so.
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Sources and how we use the data
Ontario Lake Partner exports through 2025, retrieved October 13, 2026. Coverage is monitored waterbodies, including some river sites, not every Ontario lake. Township labels come from the source and may reflect historic boundaries.
We join records by provincial lake and site identifiers. Each sampling location stays separate. We exclude invalid values, exact duplicate observations and phosphorus results marked as possible outliers. Tables show the mean, range and sample count for the latest five sampled years at each site. Sampling schedules vary, so these are not standardised annual averages or a water-quality ranking.
Provincial source files · How we read the data · Open Government Licence - Ontario
Contains information licensed under the Open Government Licence - Ontario.