Pull up two "Hummelstown, PA" listings side by side and you can end up comparing homes that don't share a school district, a tax collector, or even a township. One sits inside the historic borough. The other carries the same mailing address but sits a mile or two out, inside Derry Township, the municipality that contains Hershey. The zip code on the listing sheet is identical. Almost everything underneath it is not.
That split explains something buyers keep running into when they check the numbers for Hummelstown online: a median sale price that looks modest sitting next to an average sale price that looks nowhere close. Over the three months ending in May 2026, Hummelstown's median sale price ran $262,000, up 9.3% from the same stretch a year earlier. The same market snapshot, pulled in July 2026, put the average house price at $440,000, up 27.5% year over year. Those aren't two ways of describing the same market. They're two markets, reported under one place name.
Same Mailing Address, Two School Boards
The Borough of Hummelstown belongs to Lower Dauphin School District, alongside four townships: Conewago, East Hanover, Londonderry and South Hanover. The district's roots go back to 1952, when the borough and three of those townships formed the original Hummelstown Joint School District, later renamed and expanded to its current five-municipality footprint.
Derry Township, the township that borders the borough and contains Hershey, runs its own school system entirely: Derry Township School District, headquartered on East Granada Avenue in Hershey. It is a completely separate taxing and governing body from Lower Dauphin, even though a Derry Township parcel can carry the exact same "Hummelstown, PA" mailing address as a home three blocks inside the actual borough line.
That's not a rare edge case. Search listings under a Hummelstown address and you'll find entire communities, Southpoint, Southpoint Meadows, Southpoint Commons, Deer Run, High Pointe in Hershey, Orchard Run, that sit physically inside Derry Township and feed into Derry Township schools, not Lower Dauphin. Meanwhile, a townhouse listed as being "within the highly regarded Lower Dauphin School District" a few streets over is in the actual borough. Same zip. Different school board entirely.
The Border Has Moved Before
This isn't a fixed geographic feature like a creek or a ridge line. It's an administrative line, and it has been redrawn. Borough records show an ordinance, numbered 94-3, in which Hummelstown annexed a tract of land from Derry Township into the borough, shifting specific parcels from one jurisdiction to the other. The line that determines which school district and which tax collector a given address falls under is a matter of municipal paperwork, not fixed terrain.
That history matters for buyers because it means the boundary isn't something you can eyeball from a map or assume based on how close a home sits to Main Street. It has to be checked parcel by parcel.
What Actually Changes Depending On Which Side You're On
| In the Borough (Lower Dauphin) | In Derry Township (Derry Township Schools) | |
|---|---|---|
| School district | Lower Dauphin School District | Derry Township School District |
| Governing municipality | Hummelstown Borough | Derry Township |
| Typical housing stock | Victorian two-stories, craftsman bungalows, Federal-era homes, older infill | Newer subdivisions and townhome communities (Southpoint, Deer Run, High Pointe, Orchard Run and similar) |
| Real estate tax collection | Local borough tax collector | Dauphin County Treasurer's Office handles Derry Township and Derry Township School District real estate tax billing |
| Where to verify | Dauphin County's annual municipal millage rate schedule | Same source, different taxing district line |
Dauphin County sets millage rates separately for every municipality and school district in the county each year, and effective property tax burdens across the county typically run in the 2% to 3% range of assessed value annually, but the exact rate depends entirely on which lines a given parcel falls inside. Two homes ten minutes apart, both addressed "Hummelstown," can land on completely different rows of that schedule.
Why This Shows Up In The Price Data
The borough's housing stock is old by design. Hummelstown was laid out in 1762, incorporated in 1874, and its center still reflects that: brick and brownstone rowhouses, Victorian two-stories, craftsman bungalows on modest in-town lots. That stock trades at borough-scale prices, which is a large part of why the recent three-month median for "Hummelstown" sits at $262,000.
The Derry Township side of the same mailing address looks nothing like that. Newer construction, larger square footage, subdivision amenities, and proximity to Hershey Medical Center's employment base pull those sale prices well above the borough's older housing stock. That's the stock doing most of the work to pull the average price up to $440,000, a number nearly $180,000 higher than the median for the same reported area.
A median and an average that far apart is a signal, not noise. It means the "Hummelstown" market isn't one market. It's a historic borough and a slice of Derry Township, sharing a mailing address and getting reported as if they were one thing.
Price per square foot tells a similar story from a different angle. Recent figures put Hummelstown's price per square foot in the $175 to $182 range depending on whether you're looking at closed sales or active listings, and days on market for the broader Hummelstown-addressed area sitting in the high teens to low twenties as of mid-2026. Those blended figures average out a fast-moving borough starter-home market and a slower-moving new-construction segment that behaves more like the rest of the Hershey corridor.
Before You Write An Offer
None of this shows up automatically on a listing sheet. A buyer working from the mailing address alone has no way to know which side of the line a property sits on. A few concrete steps close that gap:
- Ask the listing agent directly which school district and which municipality the parcel is assigned to, not just the mailing address on file.
- Check the parcel against Dauphin County's published municipal millage schedule to confirm the actual tax collector and rate that apply.
- If school assignment matters to your decision, confirm it with the district directly rather than assuming based on the town name on the listing.
- For anyone planning to build or add square footage later, remember that a supplemental tax reassessment applies the current millage rate to the increase in assessed value, prorated for the months remaining in the tax year, so knowing which rate schedule applies before you buy affects that calculation too.
A Few Questions Worth Settling Early
If a listing says "Hummelstown, PA," does that guarantee Lower Dauphin schools? No. The mailing address reflects the postal zip code, not the school district or municipal boundary. Communities like Southpoint, Deer Run and High Pointe in Hershey carry a Hummelstown address while feeding into Derry Township schools.
Why would two homes in the same county have different tax collectors? Pennsylvania counties don't collect all local real estate taxes centrally by default. Dauphin County's Treasurer's Office handles billing for specific municipalities and school districts, including Derry Township, while other municipalities, including Hummelstown Borough, use their own local tax collector. Which one applies depends on the parcel's actual municipality, not its mailing address.
Has this boundary always been the same? No. Borough records show at least one formal annexation, ordinance 94-3, that moved specific parcels from Derry Township into the Hummelstown borough. The line is administrative and has changed before.
Buying inside a mailing address instead of a taxing jurisdiction is an easy mistake to make and an expensive one to discover after closing. If you're comparing homes that all say "Hummelstown" and want to know, parcel by parcel, which school district and which tax bill actually applies, the Got Bob Hoobler Team works this exact corridor every day and can walk you through the specific line for the address you're looking at before you write an offer.
