Fort Cobb Reservoir

As of October 8, 2026, Fort Cobb Reservoir is filled to 74.3% of its total capacity, holding roughly 73 hm³ of water out of a maximum 99 hm³. At this level the reservoir is within its normal operating range.

Over the most recent week on record the fill level has held broadly steady (-0.5 pts), and it is 16.9 points below its level on the same date a year earlier.

Across the readings we hold for Fort Cobb Reservoir — 1825 data points between October 10, 2021 and October 8, 2026 — the level has ranged from a low of 74.3% (October 7, 2026) to a high of 105.0% (June 9, 2022). On average the reservoir is fullest around June and at its lowest around September.

It is operated by BOR primarily for multiple purposes. It lies within the Oklahoma basin at 35.167°N, 98.450°W.