Zip Code: 63121 (Saint Louis, MO) - Market Hotness: Trend of Supply Score (Realtor)
Updated on March 13, 2026.

According to data from Realtor.com, the market hotness: supply score for the 63121 Zip Code in February 2026 was 75.117.

You can see similar for other Missouri Zip Codes.

The chart and table below shows the trend of the market hotness: supply score for the 63121 zip code.

Note: Supply Score is an index representing the metro's median days on market ranking compared to other metros.

Data Source: Realtor.
Zip Code: 63121 - Market Hotness: Trend of Supply Score
Zip Code: 63121 - Market Hotness: Trend of Supply Score
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Month Supply Score
September 2017 45.3670727897532
October 2017 51.16626236238104
November 2017 43.37752525252525
December 2017 48.01600103232467
January 2018 31.769266760243298
February 2018 57.91776635643839
March 2018 53.483477162702584
April 2018 44.33132488399474
May 2018 63.03902838427947
June 2018 54.477165459017485
July 2018 53.61270743203978
August 2018 52.36331119059785
September 2018 60.822977428354044
October 2018 46.210407239819006
November 2018 54.49541284403669
December 2018 50.97018761243896
January 2019 58.66886326194398
February 2019 71.11462124854062
March 2019 60.55420852095601
April 2019 57.17224355458036
May 2019 48.83034918021541
June 2019 27.472601358165804
July 2019 16.04744118996134
August 2019 22.085610200364297
September 2019 38.67079223876749
October 2019 52.69171185127808
November 2019 61.29410233042572
December 2019 33.92014880754667
January 2020 20.301381331100878
February 2020 99.87585804001753
March 2020 84.72968002942258
April 2020 36.72257681460591
May 2020 24.074350552403704
June 2020 19.46969127920078
July 2020 11.267496713324569
August 2020 11.154458598726116
September 2020 2.763061374195126
October 2020 0.5198725473754822
November 2020 0.201765447667087
December 2020 0.2909539763710104
January 2021 1.8229904599981108
February 2021 90.889415644646
March 2021 61.99270405836753
April 2021 22.17694994179278
May 2021 41.66281755196305
June 2021 12.716952297784085
July 2021 38.124558393055416
August 2021 32.394101624870856
September 2021 22.67637687756031
October 2021 26.640822214208438
November 2021 17.976710334788937
December 2021 61.697965571205
January 2022 93.09699438511505
February 2022 56.479521971866056
March 2022 66.97431781701445
April 2022 41.93590074954769
May 2022 62.28932584269663
June 2022 40.49244775501759
July 2022 13.411132722052422
August 2022 9.911988379048108
September 2022 2.655762583256049
October 2022 24.236269780824234
November 2022 90.81828019645384
December 2022 87.3079208761355
January 2023 64.9973314356876
February 2023 47.36892552477715
March 2023 90.75857916917519
April 2023 85.81691297208539
May 2023 73.31582668417332
June 2023 75.05172923440733
July 2023 69.60664088293558
August 2023 36.50865585062993
September 2023 53.36824354309044
October 2023 73.65586802290794
November 2023 58.36292913918485
December 2023 48.824822455191075
January 2024 55.036638121303085
February 2024 74.88995036058817
March 2024 80.51389817556596
April 2024 41.68607359105729
May 2024 19.835383502170767
June 2024 18.217924365394577
July 2024 63.688025037061436
August 2024 50.46991726243072
September 2024 39.579917232763336
October 2024 50.1728774490972
November 2024 43.19331595891461
December 2024 71.08730831471064
January 2025 86.64586070959264
February 2025 91.54130490845009
March 2025 82.66160352118754
April 2025 65.2320107599193
May 2025 36.15184099055067
June 2025 36.763453348819205
July 2025 34.252856283824414
August 2025 30.723158828748893
September 2025 70.01814882032667
October 2025 72.80289330922243
November 2025 65.37151141718014
December 2025 60.20265805125192
January 2026 65.62814849259863
February 2026 54.043137571694
March 2026 75.1170623511049