Illinois deer research / Warren County
Warren County, Illinois Deer Hunting Research
Central IL region. FDR Deer Herd Index 58.5, ranked #28 of 102 Illinois counties. Built from IDNR public harvest records and the Buck Index.
B - StrongWhat drives the Warren County index
The FDR Index combines five measured parts into one 0 to 100 score. Each part is scored 0–100 against all Illinois counties.
Buck Index
88→ out of 100. How this county ranks on the Buck Index against every county we cover. 100 is the top. Land is measured as what a hunter can actually hunt (10 m estimate).
Hunting pressure
Pressure Index 3.2 / 10 (Lower). About 3.9 deer hunters per square mile of huntable land: 32nd percentile of 3,051 rated counties in 48 states, 7th percentile within Illinois. How often deer run into people, 0 to 10 on one scale across every rated state; 10 is the most crowded county in the country.
Modeled. Illinois does not publish hunter numbers by county, so FDR places this county within Illinois from deer harvest per huntable acre (2020 to 2024 seasons) and population density. The model was checked against agency hunter counts in Michigan, Indiana and Missouri, and against agency hunter surveys by hunting unit in 10 more states. It estimates crowding; it is not a hunter count. Illinois averages 5.2 deer hunters per square mile of huntable land (state wildlife agency count, 2023-24 season).
2005–2024 harvest trend
| Season | Archery | Firearm | Total |
|---|---|---|---|
| 2024 | 346 | 542 | 888 |
| 2023 | 333 | 531 | 864 |
| 2022 | 279 | 485 | 764 |
| 2021 | 286 | 454 | 740 |
| 2020 | 317 | 498 | 815 |
| 2019 | 281 | 488 | 769 |
| 2018 | 271 | 514 | 785 |
| 2017 | 264 | 580 | 844 |
| 2016 | 247 | 603 | 850 |
| 2015 | 279 | 630 | 909 |
| 2014 | 279 | 605 | 884 |
| 2013 | 253 | 610 | 863 |
| 2012 | 268 | 872 | 1,140 |
| 2011 | 282 | 751 | 1,033 |
| 2010 | 306 | 729 | 1,035 |
| 2009 | 298 | 774 | 1,072 |
| 2008 | 265 | 827 | 1,092 |
| 2007 | 275 | 806 | 1,081 |
| 2006 | 302 | 835 | 1,137 |
| 2005 | 359 | 917 | 1,276 |
Totals are IDNR's all-season county harvest; firearm includes the youth, muzzleloader and late-winter seasons. Source: Hunt Illinois county deer harvest. Buck density: Warren County averages 1.78 adult bucks harvested per 1,000 huntable acres (2005-2024).
See full Warren County harvest charts →
Harvest by sex
IDNR records each harvested deer by sex. In 2024, Warren County ran 512 bucks (males) and 376 does (females): 57.7% bucks.
| Season | Bucks (M) | Does (F) | Total | % bucks |
|---|---|---|---|---|
| 2024 | 512 | 376 | 888 | 57.7% |
| 2023 | 532 | 332 | 864 | 61.6% |
| 2022 | 462 | 302 | 764 | 60.5% |
| 2021 | 418 | 322 | 740 | 56.5% |
| 2020 | 474 | 341 | 815 | 58.2% |
| 2019 | 428 | 341 | 769 | 55.7% |
| 2018 | 447 | 338 | 785 | 56.9% |
| 2017 | 520 | 324 | 844 | 61.6% |
| 2016 | 489 | 361 | 850 | 57.5% |
| 2015 | 522 | 387 | 909 | 57.4% |
| 2014 | 430 | 454 | 884 | 48.6% |
| 2013 | 451 | 412 | 863 | 52.3% |
| 2012 | 613 | 527 | 1,140 | 53.8% |
| 2011 | 523 | 510 | 1,033 | 50.6% |
| 2010 | 524 | 511 | 1,035 | 50.6% |
| 2009 | 519 | 553 | 1,072 | 48.4% |
| 2008 | 595 | 497 | 1,092 | 54.5% |
| 2007 | 600 | 481 | 1,081 | 55.5% |
| 2006 | 615 | 522 | 1,137 | 54.1% |
| 2005 | 693 | 583 | 1,276 | 54.3% |
See full Warren County sex-composition chart →
Age structure
IDNR classifies each deer as adult, yearling (1.5-yr), or fawn. In 2024, Warren County ran 70.9% adult, 16.4% yearling, and 12.6% fawn. A higher adult share points to a more mature age structure.
| Season | Adult | Yearling | Fawn | Total |
|---|---|---|---|---|
| 2024 | 630 | 146 | 112 | 888 |
| 2023 | 575 | 137 | 152 | 864 |
| 2022 | 514 | 139 | 111 | 764 |
| 2021 | 498 | 142 | 100 | 740 |
| 2020 | 552 | 139 | 124 | 815 |
| 2019 | 528 | 138 | 103 | 769 |
| 2018 | 498 | 138 | 149 | 785 |
| 2017 | 577 | 148 | 119 | 844 |
| 2016 | 567 | 144 | 139 | 850 |
| 2015 | 555 | 178 | 176 | 909 |
| 2014 | 555 | 149 | 180 | 884 |
| 2013 | 520 | 123 | 220 | 863 |
| 2012 | 756 | 152 | 232 | 1,140 |
| 2011 | 658 | 148 | 227 | 1,033 |
| 2010 | 710 | 138 | 187 | 1,035 |
| 2009 | 697 | 148 | 227 | 1,072 |
| 2008 | 687 | 177 | 228 | 1,092 |
| 2007 | 719 | 169 | 193 | 1,081 |
| 2006 | 703 | 171 | 263 | 1,137 |
| 2005 | 803 | 185 | 287 | 1,275 |
Age class is IDNR's field classification at check-in, not a lab-aged tooth-wear cohort; treat it as a directional maturity signal.
See full Warren County composition charts →
Seasons & access
| Season | Method | Dates | Tags |
|---|---|---|---|
| Archery · Oct 1 to mid-Jan | archery | 2026-10-01 → 2027-01-17 | otc |
| Firearm · 1st + 2nd Shotgun Season | firearm | 2026-11-20 → 2026-12-06 | otc |
| Muzzleloader · December | muzzleloader | 2026-12-11 → 2026-12-13 | otc |
Bow-huntable land, public and private: 149,018 acres (10 m estimate). Verify current season dates, permits, and site-specific rules with IDNR before hunting.
See Warren County on the map
Parcels with owner & acreage, public hunting land with regs, access points, leaf-off imagery, and this research, together on one hunting map.
Nearby counties
Frequently asked questions
Is Warren County, Illinois good for deer hunting?
Warren County scores 58.5 of 100 on the FDR Deer Herd Index (B - Strong), ranked #28 of 102 Illinois counties. The index is built from IDNR public harvest records, habitat, herd quality, momentum, and the Buck Index.
What is the Buck Index for Warren County?
Warren County has a Buck Index of 88 out of 100. How this county ranks on the Buck Index against every county we cover. 100 is the top. Land is measured as what a hunter can actually hunt (10 m estimate).
How many deer were harvested in Warren County last season?
IDNR records show 888 deer harvested in Warren County in 2024, the most recent reported season.
Cite this
Fully Drawn Research. "Warren County, Illinois deer hunting research." County page. https://www.fullydrawnresearch.ai/research/il/warren. Accessed Nov 1, 2026.
Data and charts from this page are free to use with attribution. See the Content Lab.