Deer in Illinois in May
Yes, May is one of the best months to see deer in Illinois. It is the 2nd busiest month of the year, with 1,270 of the 10,090 sightings logged across the year (12.6%), based on verified iNaturalist records.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 2, 2026.
Peak month for deer in Illinois
12.6%
of yearly sightings
1,270
records in May
#2
busiest month of 12
10,090
verified records a year
April 14.6%, May 12.6%, June 11.8%. Busiest month is April at 14.6%.
10,090 verified observations of deer in Illinois, recorded across 12 months of the year on iNaturalist.
When deer are recorded in Illinois
Peak month
April
1,475 records (14.6% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 588 | 5.8% |
| February | 601 | 6% |
| March | 961 | 9.5% |
| Aprilpeak | 1,475 | 14.6% |
| Maypeak | 1,270 | 12.6% |
| Junepeak | 1,193 | 11.8% |
| July | 890 | 8.8% |
| August | 733 | 7.3% |
| September | 673 | 6.7% |
| October | 600 | 5.9% |
| November | 658 | 6.5% |
| December | 448 | 4.4% |
Deer you are most likely to see
| Species | Verified observations |
|---|---|
| White-tailed Deer | 10,079 |
In Illinois, May carries 12.6% of the year's deer sightings, about 4.3 points above an even month-to-month split. That makes it the 2nd busiest of the twelve months, out of 12 months with recorded activity.
Activity is easing off from April (14.6%) into May, and it heads toward June (11.8%) after. This is right inside the peak window, so May is one of the surest months to plan a trip around.
The deer most often recorded in Illinois are White-tailed Deer. Those counts are annual totals rather than a May split, so treat them as which species you are likely to encounter, while the month figures above show how many sightings fall in May itself.
Which deer you are most likely to see
- White-tailed Deer10,079 records
Plan your deer trip in Illinois
Start with live tours near Lewis & Clark National Historic Trail, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
GetYourGuide
Live tours nearbySee live tours near Lewis & Clark National Historic Trail
Use the live GetYourGuide widget to compare local departures and activity styles close to the main deer viewing area.
Booking.com
Stay nearbyStay near Lewis & Clark National Historic Trail
Compare hotels, cabins and lodges close to the best deer viewing area in Illinois.
Viator
Broader backupBook a deer tour in Illinois
Compare guided wildlife tours, boat trips and nature experiences if you want a second travel network beyond the live widget.
Gear to see them
Frequently asked questions
Can you see deer in Illinois in May?+
Yes. May accounts for 1,270 of the 10,090 verified deer sightings logged in Illinois across the year, which is 12.6% of the annual total.
Is May a good time to see deer in Illinois?+
May is one of the best months. It ranks 2nd of the year and sits inside the peak window of April, May and June.
What month is best for deer in Illinois?+
April is the single busiest month, with the broader peak running through April, May and June, based on 10,090 verified observations.
Which deer are you most likely to see in Illinois?+
The most-recorded species in Illinois are White-tailed Deer, based on all-time iNaturalist counts.
See deer in Illinois in other months
More places to see deer
More wildlife in Illinois