Williamson County, Illinois - Trend of Zillow Observed Rent Index (ZORI) for All Homes Plus Multifamily, Smooth and Seasonally Adjusted (Zillow)

Updated on March 22, 2026.

According to data from Zillow.com, the smoothed and seasonally adjusted Zillow Observed Rent Index (ZORI) for All Homes Plus Multifamily in Williamson County, Illinois in February 2026 was $977.762. The month over month percentage change (MoM) was 1.76%, and the year over year percentage change (YoY) was 8.55%.

The chart below shows the trend of the smoothed and seasonally adjusted ZORI for Williamson County, IL. The table below shows the trend of the smoothed and seasonally adjusted ZORI, and the MoM and YoY percentage changes for Williamson County, IL.

You can see similar information for other Illinois counties.

Note: Zillow Observed Rent Index (ZORI) is a smoothed measure of the typical observed market rate rent across a given region. ZORI is a repeat-rent index that is weighted to the rental housing stock to ensure representativeness across the entire market, not just homes currently listed for-rent.

Data Source: Zillow.
Williamson County, IL - Trend of Zillow Observed Rent Index (ZORI) for All Homes Plus Multifamily, Smooth and Seasonally Adjusted ($)
Williamson County, IL - Trend of Zillow Observed Rent Index (ZORI) for All Homes Plus Multifamily, Smooth and Seasonally Adjusted
1 – 10 of 134
Month ZORI ($) MoM Perc. Change (%) YoY Perc. Change (%)
Jan 2015 0 -100.00 NaN
Feb 2015 0 NaN NaN
Mar 2015 0 NaN NaN
Apr 2015 0 NaN NaN
May 2015 0 NaN NaN
Jun 2015 0 NaN NaN
Jul 2015 0 NaN NaN
Aug 2015 0 NaN NaN
Sep 2015 0 NaN NaN
Oct 2015 0 NaN NaN
Nov 2015 0 NaN -100.00
Dec 2015 0 NaN -100.00
Jan 2016 0 NaN NaN
Feb 2016 0 NaN NaN
Mar 2016 0 NaN NaN
Apr 2016 0 NaN NaN
May 2016 0 NaN NaN
Jun 2016 0 NaN NaN
Jul 2016 0 NaN NaN
Aug 2016 0 NaN NaN
Sep 2016 0 NaN NaN
Oct 2016 0 NaN NaN
Nov 2016 0 NaN NaN
Dec 2016 0 NaN NaN
Jan 2017 0 NaN NaN
Feb 2017 0 NaN NaN
Mar 2017 0 NaN NaN
Apr 2017 0 NaN NaN
May 2017 0 NaN NaN
Jun 2017 0 NaN NaN
Jul 2017 0 NaN NaN
Aug 2017 0 NaN NaN
Sep 2017 0 NaN NaN
Oct 2017 0 NaN NaN
Nov 2017 0 NaN NaN
Dec 2017 0 NaN NaN
Jan 2018 0 NaN NaN
Feb 2018 0 NaN NaN
Mar 2018 0 NaN NaN
Apr 2018 0 NaN NaN
May 2018 0 NaN NaN
Jun 2018 0 NaN NaN
Jul 2018 0 NaN NaN
Aug 2018 0 NaN NaN
Sep 2018 0 NaN NaN
Oct 2018 0 NaN NaN
Nov 2018 0 NaN NaN
Dec 2018 0 NaN NaN
Jan 2019 0 NaN NaN
Feb 2019 0 NaN NaN
Mar 2019 0 NaN NaN
Apr 2019 0 NaN NaN
May 2019 0 NaN NaN
Jun 2019 0 NaN NaN
Jul 2019 0 NaN NaN
Aug 2019 0 NaN NaN
Sep 2019 0 NaN NaN
Oct 2019 0 NaN NaN
Nov 2019 0 NaN NaN
Dec 2019 0 NaN NaN
Jan 2020 0 NaN NaN
Feb 2020 0 NaN NaN
Mar 2020 0 NaN NaN
Apr 2020 0 NaN NaN
May 2020 0 NaN NaN
Jun 2020 0 NaN NaN
Jul 2020 0 NaN NaN
Aug 2020 0 NaN NaN
Sep 2020 0 NaN NaN
Oct 2020 0 NaN NaN
Nov 2020 0 NaN NaN
Dec 2020 0 NaN NaN
Jan 2021 0 NaN NaN
Feb 2021 0 NaN NaN
Mar 2021 0 NaN NaN
Apr 2021 0 NaN NaN
May 2021 0 NaN NaN
Jun 2021 0 NaN NaN
Jul 2021 0 NaN NaN
Aug 2021 0 NaN NaN
Sep 2021 0 NaN NaN
Oct 2021 0 NaN NaN
Nov 2021 0 NaN NaN
Dec 2021 0 NaN NaN
Jan 2022 0 NaN NaN
Feb 2022 0 NaN NaN
Mar 2022 0 NaN NaN
Apr 2022 0 NaN NaN
May 2022 0 NaN NaN
Jun 2022 764.2217600439157 Infinity Infinity
Jul 2022 766.5062421480814 0.30 Infinity
Aug 2022 768.6413025602537 0.28 Infinity
Sep 2022 781.8543224642104 1.72 Infinity
Oct 2022 782.5386284224257 0.09 Infinity
Nov 2022 782.9960090623549 0.06 Infinity
Dec 2022 774.5695179555918 -1.08 Infinity
Jan 2023 781.6366293518768 0.91 Infinity
Feb 2023 793.2869976463247 1.49 Infinity
Mar 2023 810.226627357761 2.13 Infinity
Apr 2023 804.4307105213596 -0.71 Infinity
May 2023 806.0558534832438 0.20 Infinity
Jun 2023 803.140598826115 -0.36 5.09
Jul 2023 810.6227263325692 0.93 5.76
Aug 2023 798.481177645343 -1.50 3.88
Sep 2023 797.7001258542509 -0.10 2.03
Oct 2023 816.3778695537613 2.34 4.32
Nov 2023 836.9210142693368 2.52 6.89
Dec 2023 850.3358219057934 1.60 9.78
Jan 2024 843.6556753709223 -0.79 7.94
Feb 2024 835.3413211492697 -0.99 5.30
Mar 2024 835.9915814579055 0.08 3.18
Apr 2024 841.3115228118687 0.64 4.59
May 2024 853.1982485946428 1.41 5.85
Jun 2024 859.3328364027733 0.72 7.00
Jul 2024 876.4301486619256 1.99 8.12
Aug 2024 883.3253193614138 0.79 10.63
Sep 2024 884.4017019286422 0.12 10.87
Oct 2024 876.3040772310545 -0.92 7.34
Nov 2024 878.7681643088779 0.28 5.00
Dec 2024 888.9413579987444 1.16 4.54
Jan 2025 900.3812506914768 1.29 6.72
Feb 2025 900.7517670009033 0.04 7.83
Mar 2025 903.4108752531916 0.30 8.07
Apr 2025 911.7902976759374 0.93 8.38
May 2025 913.806242949694 0.22 7.10
Jun 2025 921.4613754950225 0.84 7.23
Jul 2025 916.232834683305 -0.57 4.54
Aug 2025 929.3243592324483 1.43 5.21
Sep 2025 939.6895408810014 1.12 6.25
Oct 2025 949.8657485381303 1.08 8.40
Nov 2025 951.306183254731 0.15 8.26
Dec 2025 952.7966590483926 0.16 7.18
Jan 2026 960.811815059863 0.84 6.71
Feb 2026 977.7619047619047 1.76 8.55