Macoupin County · reservoir · 15 acres
Lake Williamson
Stocked 3× since 2022 · Illinois DNR
Lake Williamson is a reservoir in Macoupin County, Illinois, stocked with Channel Catfish — most recently on Jan 1, 2026. FishableWaters aggregates every stocking record for this water from Illinois DNR; the latest schedule and today's bite windows are above.
Best days this week
Days near a new or full moon tend to fish best.
Today's bite windows
Conditions, next 3 days
Today
Overcast
83°
61°
6 mph
0%
Fri
Drizzle
80°
68°
15 mph
64%
Sat
Showers
76°
67°
15 mph
74%
→ pressure steadyStable weather — expect a normal bite.
Stocking ledger
| — 2026 — | ||||
| Jan 1 | Channel Catfish | 450 | 9" | |
| — 2024 — | ||||
| Jan 1 | Channel Catfish | 450 | 2" | |
| — 2022 — | ||||
| Jan 1 | Channel Catfish | 450 | 9" | |
Angler reports
What's biting
No reports yet — be the first
Best bite times
No reports yet
Field notes
No notes yet
Nearby waters
- Lake Carlinville1.1 mistocked Jan 1, 2026
- Denbys Pond2.4 mi
- Briar Creek2.5 mi
- Gillespie Country Club Lake3.0 mi
- Deer Run Lake3.2 mi
- Honey Creek2.5 mi
- Smith Lake3.2 mi
- Recirculation Pond3.6 mi
Seasons, limits, and rules are the state's call — check the official IL regulations and buy your license before you go. We link the source; we never restate the rules.
Lake Williamson fishing — FAQ
What fish are stocked in Lake Williamson?+
Lake Williamson is stocked with Channel Catfish in Macoupin County, Illinois, most recently on Jan 1, 2026 by Illinois DNR. The full stocking ledger is on this page.
Do I need a license to fish Lake Williamson?+
Yes — Illinois requires a fishing license. Buy one from the state and check current seasons and limits before you go; both are linked on this page.
Where is Lake Williamson?+
Lake Williamson is a reservoir in Macoupin County, Illinois. Driving directions and an interactive topo map are on this page.
Data: Illinois DNR · updated Jan 1, 2026 · checked daily · we publish what agencies publish, nothing else.