Wahiawa Reservoir is a Reservoir in Honolulu, Hawaii.

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The Wahiawa Public Fishing Area includes a portion of the privately-owned Wahiawa Reservoir (Lake Wilson) in the central portion of Oahu. The Wahiawa State Freshwater Park is located along the South Fork of the Reservoir and includes a boat launching ramp and vehicle-trailer parking areas. The Park is a facility of the Division of State Parks. Rules of the State Parks System apply to the use of the facility.

The following is permitted at Wahiawa Reservoir:
To fish with hook-and-line with not more than one lure or baited hook or two artificial flies attached to a single line, provided that on weekends and holidays only one line may be used, and on weekdays other than holidays two lines may be used.
To use attended traps and dip nets up to two feet long, wide, or high, excluding the handle, to land hooked fish or to take certain baitfishes, provided that tucunare, bass, channel catfish and oscar shall not be used as bait.