Zip Code: 21837 (Mardela Springs, MD) - 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 21837 Zip Code in February 2026 was 4. The month over month percentage change (MoM) was 1.0%, and the year over year percentage change (YoY) was 3.0%.

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

The chart below shows the trend of active listing count in the 21837 zip code. The table below shows the trend, and the MoM and YoY percentage changes.

Data Source: Realtor.
Zip Code: 21837 - Trend of Active Listing Count of Houses
Zip Code: 21837 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 9
Sep 2016 10
Oct 2016 9
Nov 2016 10
Dec 2016 13
Jan 2017 14
Feb 2017 13
Mar 2017 14
Apr 2017 13
May 2017 10
Jun 2017 10
Jul 2017 7
Aug 2017 5 -0.2308 -0.4444
Sep 2017 2 -0.6 -0.7895
Oct 2017 4 1.0 -0.5556
Nov 2017 4 -0.125 -0.65
Dec 2017 4 0.1429 -0.68
Jan 2018 6 0.5 -0.5714
Feb 2018 6 -0.0833 -0.5769
Mar 2018 5 -0.1818 -0.6786
Apr 2018 3 -0.3333 -0.76
May 2018 1 -0.6667 -0.9
Jun 2018 1 0.0 -0.9
Jul 2018 4 3.0 -0.3846
Aug 2018 4 0.0 -0.2
Sep 2018 5 0.125 1.25
Oct 2018 4 -0.1111 0.0
Nov 2018 5 0.125 0.2857
Dec 2018 5 0.1111 0.25
Jan 2019 4 -0.2 -0.3333
Feb 2019 5 0.125 -0.1818
Mar 2019 6 0.3333 0.3333
Apr 2019 5 -0.1667 0.6667
May 2019 3 -0.4 2.0
Jun 2019 4 0.3333 3.0
Jul 2019 7 0.75 0.75
Aug 2019 5 -0.2857 0.25
Sep 2019 4 -0.2 -0.1111
Oct 2019 5 0.25 0.25
Nov 2019 5 0.0 0.1111
Dec 2019 5 0.0 0.0
Jan 2020 3 -0.4 -0.25
Feb 2020 3 0.0 -0.3333
Mar 2020 4 0.3333 -0.3333
Apr 2020 5 0.25 0.0
May 2020 6 0.2 1.0
Jun 2020 4 -0.3333 0.0
Jul 2020 5 0.25 -0.2857
Aug 2020 4 -0.2 -0.2
Sep 2020 4 0.0 0.0
Oct 2020 4 0.0 -0.2
Nov 2020 3 -0.25 -0.4
Dec 2020 3 -0.1667 -0.5
Jan 2021 4 0.6 0.3333
Feb 2021 3 -0.25 0.0
Mar 2021 3 0.0 -0.25
Apr 2021 4 0.1667 -0.3
May 2021 3 -0.1429 -0.5
Jun 2021 3 0.0 -0.25
Jul 2021 1 -0.6667 -0.8
Aug 2021 3 2.0 -0.25
Sep 2021 4 0.3333 0.0
Oct 2021 5 0.25 0.25
Nov 2021 6 0.2 1.0
Dec 2021 3 -0.5 0.2
Jan 2022 3 0.0 -0.25
Feb 2022 1 -0.6667 -0.6667
Mar 2022 1 0.0 -0.6667
Apr 2022 1 0.0 -0.7143
May 2022 0 -1.0 -1.0
Jun 2022 1 -0.6667
Jul 2022 1 0.0 0.0
Aug 2022 2 1.0 -0.3333
Sep 2022 3 0.25 -0.375
Oct 2022 3 0.0 -0.5
Nov 2022 4 0.6 -0.3333
Dec 2022 5 0.25 0.6667
Jan 2023 4 -0.2 0.3333
Feb 2023 3 -0.25 2.0
Mar 2023 2 -0.3333 1.0
Apr 2023 3 0.5 2.0
May 2023 2 -0.3333
Jun 2023 4 1.0 3.0
Jul 2023 3 -0.25 2.0
Aug 2023 3 0.0 0.5
Sep 2023 2 -0.3333 -0.2
Oct 2023 1 -0.5 -0.6
Nov 2023 0 -1.0 -1.0
Dec 2023 1 -0.8
Jan 2024 2 1.0 -0.5
Feb 2024 2 0.0 -0.3333
Mar 2024 2 0.0 0.0
Apr 2024 3 0.5 0.0
May 2024 3 -0.1667 0.25
Jun 2024 5 1.0 0.25
Jul 2024 4 -0.2 0.3333
Aug 2024 3 -0.25 0.0
Sep 2024 3 0.0 0.5
Oct 2024 4 0.1667 2.5
Nov 2024 3 -0.1429
Dec 2024 5 0.6667 4.0
Jan 2025 6 0.1 1.75
Feb 2025 2 -0.6364 0.0
Mar 2025 1 -0.5 -0.5
Apr 2025 1 0.0 -0.6667
May 2025 4 2.5 0.4
Jun 2025 5 0.4286 0.0
Jul 2025 7 0.3 0.625
Aug 2025 7 0.0 1.1667
Sep 2025 4 -0.3846 0.3333
Oct 2025 4 0.0 0.1429
Nov 2025 4 -0.125 0.1667
Dec 2025 3 -0.1429 -0.4
Jan 2026 2 -0.3333 -0.6364
Feb 2026 2 0.0 0.0
Mar 2026 4 1.0 3.0