What the Pros Know
Market Snapshot
Zip Code 18109 | Lehigh County, PA
17,745
Population
YoY
202235.1
Median Age
YoY
2022$53,540
Median Household Income
YoY
2022$324,950
Median Sale Price
0.6% MoM
8.9% YoY
6/202516
Homes Sold
6.7% MoM
20.0% YoY
6/20250.4
Months Inventory
64.1% MoM
140.6% YoY
6/20258
Days on Market
0 MoM
4 YoY
6/20257
Listings
75.0% MoM
40.0% YoY
6/2025190
Price per Sq Ft
11.7% MoM
3.2% YoY
6/2025
See 18109 on Zillow
1. Population Data from U.S. Census Bureau.
2. Sales Data provided by Redfin, a national real estate brokerage.
MoM = Month over Month. The percentage change from the previous month to the current month.
YoY = Year over Year. The percentage change from the same period the previous year to the current period.