Two buyers are looking at the same street in Deerfield Township. Both houses carry a Mason, Ohio address. Both sit in the same zip code. Both show up in the same portal search when someone types "Mason homes for sale." One of them owes a school district income tax every April. The other does not. Nothing on the listing photos tells you which is which.
That gap is not a rounding error or a quirk of one weird parcel. It is the direct result of how Warren County drew its school district boundaries, and it is the kind of detail that never makes it into a median home price.
Mason the address and Mason the school district are not the same thing
Mason City Schools covers roughly 25 square miles, and that footprint includes the City of Mason and Deerfield Township, plus small slivers of Union and Turtlecreek townships and a piece of West Chester Township across the county line in Butler County. So far, that sounds like Deerfield Township is simply part of Mason's district. It is not that clean.
Kings Local Schools also covers parts of Mason and Deerfield Township, to the east. Lebanon City Schools picks up areas to the north that have been annexed into the City of Mason. Princeton City Schools takes a small southwestern corner of Deerfield and West Chester townships. Four different school districts touch land that a buyer might describe, casually and correctly, as "the Mason area."
Inside Deerfield Township specifically, the unincorporated communities of Kings Mills, Landen, South Lebanon, Snidercrest, Fosters, Socialville, and Twenty Mile Stand sit closer to Kings Local territory than to Mason City Schools. Kings Local's own zip code list overlaps directly with Mason's, including 45040, the zip code most people associate with Mason itself, along with 45039, 45036, 45034, 45065, 45140, 45152, and 45249.
None of that is visible from a street address. A house in zip code 45040 could be zoned to Mason City Schools, home to William Mason High School, the largest high school in Ohio by enrollment, or it could be zoned to Kings Local, depending on which side of a boundary line drawn through the township it happens to sit on.
The number that actually separates the two districts
Here is the part that has nothing to do with school quality, curriculum, or anything a district markets on its website. It is a tax mechanism, and it only applies to one side of the line.
Kings Local School District is the only school district in Warren County that levies a school district income tax, set at 1.00 percent for tax year 2026. Every other Warren County district, Mason City Schools included, does not charge one. This tax is calculated on where a resident lives, not where they work, so a Kings Local resident who commutes into Cincinnati or Dayton for a job still owes it based on their home address.
| District | School district income tax (2026) | Serves parts of |
|---|---|---|
| Mason City Schools | None | City of Mason, most of Deerfield Township, slivers of Union and Turtlecreek townships |
| Kings Local Schools | 1.00% | Parts of Mason and Deerfield Township to the east, Kings Mills, Landen, South Lebanon |
| Lebanon City Schools | None | Areas north of Mason annexed into the city |
| Princeton City Schools | None | Small southwestern portion of Deerfield and West Chester townships |
That 1 percent applies on top of Ohio's standard property tax structure, where a home's taxable value is set at 35 percent of its appraised market value under state law. A home appraised at $300,000 carries a taxable value of $105,000 for property tax purposes, a calculation that is the same regardless of which district the home sits in. The school district income tax is a separate, additional line, and it only shows up in Kings Local.
For a household earning $120,000 a year, that 1 percent works out to roughly $1,200 annually, paid every year the household lives in Kings Local territory. That number does not appear on a listing sheet. It does not move the sale price. It shows up the following spring, on a tax return, as a line item most out-of-state or first-time Warren County buyers have never budgeted for.
Why the portal search bar cannot catch this for you
Real estate portals and MLS listings pull addresses from postal zip codes, not school district GIS layers. A Mason, OH 45040 listing reads the same whether the parcel sits inside Mason City Schools or Kings Local, because the postal system and the school district map were never designed to align. Warren County's own zip code and school district reference map shows Kings Local and Lebanon City boundaries cutting directly through Deerfield Township, independent of where the zip code lines fall.
That mismatch is the whole reason this is worth flagging before an offer goes in, not after closing. A buyer who assumes "Mason address" means "Mason City Schools, no school income tax" is making a reasonable guess based on how every other tax and cost in a transaction typically works. Property tax rates are tied to the parcel. Homeowners insurance is tied to the structure. This is the one line item tied to a district boundary that runs through the middle of a township, sometimes street by street.
How to actually confirm which side of the line a property sits on
Before writing an offer on anything in or near Deerfield Township, Landen, Kings Mills, or South Lebanon, confirm the school district assignment directly rather than assuming it from the mailing address. Two reliable ways to do that:
- Look up the parcel directly through the Warren County Auditor's property search, which ties each parcel to its taxing district rather than its zip code.
- Contact the Warren County Auditor's Office directly at 513-695-1235, the number Kings Local School District itself directs residents to when they are unsure which side of the boundary a property falls on.
Either method takes a few minutes and settles the question with certainty, which is more than a portal listing or a general area description can offer.
None of this is a statement about which district is a better fit for any particular household. It is a statement about cost, and specifically about a cost that a home's listed price will never reflect. A buyer comparing two similarly priced homes in the Mason area should treat the school district income tax question the same way they would treat an HOA fee: a real, recurring number that belongs in the monthly budget conversation, not a surprise that shows up after the first tax season.
Frequently asked questions
Does this affect homes inside the City of Mason itself, or only Deerfield Township? Mainly Deerfield Township and the unincorporated communities around it, including Kings Mills, Landen, and South Lebanon. Most of the land inside Mason's city limits falls under Mason City Schools, but Deerfield Township, which surrounds and overlaps with parts of the city, is split between Mason City Schools and Kings Local.
Is the Kings Local income tax withheld automatically, like a paycheck deduction? Ohio school district income taxes function similarly to a payroll withholding when an employer is set up to withhold them, but residents are also responsible for reporting and reconciling the tax on their annual Ohio income tax filing.
Does buying a home change what I owe if the district hasn't changed? A property's tax bill can change after a purchase due to reappraisals, new levies, or exemption changes, but the school district income tax question is separate. It depends entirely on which district's boundary the parcel sits inside, which does not shift just because the property changes hands.
If you are comparing homes anywhere near the Mason and Deerfield Township line and want a second set of eyes on the district question before you write an offer, Meghan Dwyer works this exact corridor daily and can help you confirm the details that a listing photo never will. Request a free home market consultation and get the answer before it becomes a surprise on next spring's tax return.
