Zip Code: 18109 (Allentown, PA) - Trend of Active Listing Count of Houses (Realtor)
Updated on March 13, 2026.

According to data from Realtor.com, the active listing count of houses in the 18109 Zip Code in February 2026 was 11. The month over month percentage change (MoM) was -0.1923%, and the year over year percentage change (YoY) was 0.9091%.

You can see similar for other Pennsylvania Zip Codes, and for Pennsylvania.

The chart below shows the trend of active listing count in the 18109 zip code. The table below shows the trend, and the MoM and YoY percentage changes.

Data Source: Realtor.
Zip Code: 18109 - Trend of Active Listing Count of Houses
Zip Code: 18109 Trend of Active Listing Count of Houses
Items per page:
1 – 10 of 116
Month Active Listing Count MoM Perc. Change (%) YoY Perc. Change (%)
Aug 2016 50
Sep 2016 58
Oct 2016 60
Nov 2016 45
Dec 2016 46
Jan 2017 42
Feb 2017 37
Mar 2017 31
Apr 2017 29
May 2017 35
Jun 2017 39
Jul 2017 34
Aug 2017 32 -0.0588 -0.36
Sep 2017 39 0.2031 -0.3362
Oct 2017 31 -0.1948 -0.4833
Nov 2017 31 0.0 -0.3111
Dec 2017 28 -0.1129 -0.3956
Jan 2018 25 -0.0909 -0.4048
Feb 2018 26 0.02 -0.3108
Mar 2018 25 -0.0392 -0.1967
Apr 2018 24 -0.0204 -0.1724
May 2018 18 -0.25 -0.4857
Jun 2018 19 0.0556 -0.5128
Jul 2018 18 -0.0526 -0.4706
Aug 2018 23 0.2778 -0.2813
Sep 2018 23 0.0 -0.4026
Oct 2018 31 0.3478 0.0
Nov 2018 35 0.129 0.129
Dec 2018 34 -0.0286 0.2364
Jan 2019 30 -0.1176 0.2
Feb 2019 27 -0.1167 0.0392
Mar 2019 24 -0.1132 -0.0408
Apr 2019 23 -0.0213 -0.0417
May 2019 24 0.0217 0.3056
Jun 2019 28 0.1702 0.4474
Jul 2019 33 0.2 0.8333
Aug 2019 34 0.0152 0.4565
Sep 2019 35 0.0448 0.5217
Oct 2019 35 0.0 0.129
Nov 2019 34 -0.0429 -0.0429
Dec 2019 37 0.1045 0.0882
Jan 2020 32 -0.1351 0.0667
Feb 2020 26 -0.1875 -0.0189
Mar 2020 23 -0.1154 -0.0213
Apr 2020 21 -0.087 -0.087
May 2020 16 -0.2619 -0.3404
Jun 2020 16 0.0323 -0.4182
Jul 2020 15 -0.0938 -0.5606
Aug 2020 9 -0.4138 -0.7463
Sep 2020 7 -0.1765 -0.8
Oct 2020 11 0.5 -0.7
Nov 2020 15 0.4286 -0.5522
Dec 2020 15 0.0 -0.5946
Jan 2021 14 -0.0667 -0.5625
Feb 2021 11 -0.2143 -0.5769
Mar 2021 6 -0.5 -0.7609
Apr 2021 5 -0.0909 -0.7619
May 2021 11 1.2 -0.2903
Jun 2021 10 -0.0909 -0.375
Jul 2021 14 0.4 -0.0345
Aug 2021 11 -0.2143 0.2941
Sep 2021 11 0.0 0.5714
Oct 2021 14 0.2273 0.2857
Nov 2021 13 -0.037 -0.1333
Dec 2021 14 0.0769 -0.0667
Jan 2022 10 -0.3214 -0.3214
Feb 2022 7 -0.2632 -0.3636
Mar 2022 9 0.2857 0.6364
Apr 2022 6 -0.3333 0.2
May 2022 10 0.6667 -0.0909
Jun 2022 8 -0.2 -0.2
Jul 2022 14 0.6875 -0.0357
Aug 2022 18 0.3333 0.6364
Sep 2022 16 -0.1111 0.4545
Oct 2022 20 0.2188 0.4444
Nov 2022 21 0.0769 0.6154
Dec 2022 19 -0.0952 0.3571
Jan 2023 14 -0.2632 0.4737
Feb 2023 12 -0.1429 0.7143
Mar 2023 7 -0.4583 -0.2778
Apr 2023 6 -0.1538 -0.0833
May 2023 6 0.0909 -0.4
Jun 2023 9 0.5 0.125
Jul 2023 10 0.0556 -0.2963
Aug 2023 9 -0.0526 -0.5
Sep 2023 9 0.0 -0.4375
Oct 2023 6 -0.3333 -0.6923
Nov 2023 11 0.8333 -0.4762
Dec 2023 14 0.2273 -0.2895
Jan 2024 11 -0.1852 -0.2143
Feb 2024 10 -0.0909 -0.1667
Mar 2024 11 0.05 0.6154
Apr 2024 7 -0.3333 0.2727
May 2024 8 0.0714 0.25
Jun 2024 9 0.1333 -0.0556
Jul 2024 8 -0.0588 -0.1579
Aug 2024 8 0.0 -0.1111
Sep 2024 14 0.75 0.5556
Oct 2024 11 -0.2143 0.8333
Nov 2024 13 0.1364 0.1364
Dec 2024 12 -0.04 -0.1111
Jan 2025 14 0.1667 0.2727
Feb 2025 10 -0.2857 0.0
Mar 2025 6 -0.45 -0.4762
Apr 2025 3 -0.4545 -0.5714
May 2025 4 0.1667 -0.5333
Jun 2025 3 -0.1429 -0.6471
Jul 2025 8 1.6667 0.0
Aug 2025 14 0.75 0.75
Sep 2025 14 0.0 0.0
Oct 2025 16 0.1071 0.4091
Nov 2025 17 0.0968 0.36
Dec 2025 10 -0.4118 -0.1667
Jan 2026 10 -0.05 -0.3214
Feb 2026 13 0.3684 0.3
Mar 2026 11 -0.1923 0.9091