Zip Code: 18109 (Allentown, PA) - Market Hotness: Trend of Demand Score (Realtor)
Updated on March 13, 2026.
According to data from Realtor.com, the market hotness: demand score for the 18109 Zip Code in October 2025 was 69.685.
You can see similar for other Pennsylvania Zip Codes.
The chart and table below shows the trend of the market hotness: demand score for the 18109 zip code.
Note: Demand Score is an index representing the metro's unique listing page viewers compared to other metros.
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Related Topics: Zip Code: 18109 - Realtor House Inventory Topic List
Data Source: Realtor.
Zip Code: 18109 - Market Hotness: Trend of Demand Score
Zip Code: 18109 - Market Hotness: Trend of Demand Score
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| Month | Demand Score |
|---|---|
| September 2017 | 52.06497969384567 |
| October 2017 | 49.46196429682155 |
| November 2017 | 74.2550505050505 |
| December 2017 | 58.797341763984775 |
| January 2018 | 71.39897065704164 |
| February 2018 | 34.94929851368246 |
| March 2018 | 68.23124956149582 |
| April 2018 | 66.82595747627951 |
| May 2018 | 57.36899563318777 |
| June 2018 | 74.3867579605132 |
| July 2018 | 59.262607348098406 |
| August 2018 | 60.705160960654055 |
| September 2018 | 47.81891960436216 |
| October 2018 | 48.60482654600302 |
| November 2018 | 57.912053147738064 |
| December 2018 | 49.665895656643535 |
| January 2019 | 71.53212520593081 |
| February 2019 | 70.22182542407802 |
| March 2019 | 51.74229303775546 |
| April 2019 | 71.25617114646188 |
| May 2019 | 83.34362351649858 |
| June 2019 | 70.43636119142069 |
| July 2019 | 68.61280387916912 |
| August 2019 | 75.68306010928961 |
| September 2019 | 71.96544833365564 |
| October 2019 | 67.74464239607539 |
| November 2019 | 64.24293711756282 |
| December 2019 | 64.50541420314887 |
| January 2020 | 66.12948234965815 |
| February 2020 | 70.16211479480064 |
| March 2020 | 89.59176167708716 |
| April 2020 | 69.19994062639157 |
| May 2020 | 74.53717527620185 |
| June 2020 | 79.5688424847893 |
| November 2020 | 78.41109709962168 |
| December 2020 | 70.56956445071417 |
| July 2021 | 75.4113253255274 |
| July 2022 | 47.179772158933034 |
| August 2022 | 50.995471246688886 |
| September 2022 | 62.46522215664784 |
| October 2022 | 62.342388084962344 |
| November 2022 | 57.26296512111879 |
| December 2022 | 45.64903642074879 |
| September 2024 | 74.70914343718279 |
| November 2024 | 81.1666411160509 |
| December 2024 | 81.80627263620252 |
| January 2025 | 74.57293035479631 |
| September 2025 | 58.29401088929219 |
| October 2025 | 80.8245931283906 |
| November 2025 | 69.68466835810077 |
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