Illinois Lake Levels Today
1 lakes and reservoirs ยท updated Sep 21, 2026
Lake Levels Today tracks 1 lakes and reservoirs in Illinois. Of the 1 with a published full pool, 1 are at or above it and 0 are well below it. Over the last 24 hours 0 rose and 0 fell by more than a twentieth of a foot; the rest held steady.
Every figure is the operating agency's own gauge reading, republished once a day. Open a lake for its staff gauge, a one-year chart, pool elevations and the source link. Elevations are in feet above the agency's vertical datum, so compare lakes by their distance from full pool, not by raw elevation.
| Lake | Elevation (ft) | From full | 24h |
|---|---|---|---|
| Lake Shelbyville | 599.99 | +0.29 ft | +0.05 ft |
Illinois lake level questions
Which Illinois lake is lowest right now?
Lake Shelbyville, at 599.99 ft, +0.29 ft from its full pool of 599.70 ft.
How many Illinois lakes are full?
1 of the 1 Illinois lakes with a published full pool are within half a foot of it or above, and 0 are more than halfway down the conservation pool.
How often are Illinois lake levels updated here?
Once a day. The readings on this page were pulled Sep 21, 2026; each lake page shows the exact timestamp of its gauge reading.