Valencia is one of the smallest boroughs in Butler County, and one of the largest mailing addresses. The borough itself has a few hundred residents. The Valencia 16059 ZIP code covers about 26 square miles across Butler and Allegheny counties and several townships.
If a listing says Valencia, here is how to figure out what you are actually looking at.
| Valencia at a glance | What to know |
|---|---|
| What it is | A borough in Butler County |
| Population | 537 at the 2020 census |
| Size | About 0.34 square miles |
| Incorporated | 1896 |
| ZIP code | 16059, about 26 square miles |
| Main township | Middlesex Township, 6,826 residents in 2020 |
| Borough schools | Mars Area School District |
The borough and its history
Valencia was first called Brookside and then Sunnyside. It was renamed in the 1890s because a railroad stop near Lancaster already used the Sunnyside name, and the borough was incorporated in 1896.
What the 16059 address covers
The Valencia ZIP reaches Valencia borough, Middlesex Township, and parts of Adams, Clinton and Penn townships in Butler County, plus parts of Pine and Richland townships in Allegheny County. Those are different municipalities, different tax structures, and in some cases different counties.
For most buyers, Valencia really means Middlesex Township, which surrounds the borough and holds most of the homes.
Middlesex Township
Middlesex Township is about 23 square miles in southern Butler County. It grew from 5,390 residents in 2010 to 6,826 in 2020, about 27 percent in ten years. Route 8 runs north and south through the township, and the communities of Cooperstown and Glade Mills sit inside it.
Housing ranges from older homes on larger lots to newer neighborhoods closer to Route 8. It has more open land than Adams Township to the west.
Schools: Mars Area, mostly
Valencia borough, Middlesex Township and Adams Township are all in Mars Area School District. Mars Area runs a primary center, an elementary school, Centennial School, a middle school and a high school. My Adams Township guide and Mars Borough guide cover the rest of the district.
A Valencia address in Pine or Richland Township is Pine-Richland. A Valencia address in Penn or Clinton Township is a different district again. This is the same rule as Wexford, Gibsonia and Warrendale: the mailing address does not decide the school. The parcel does. My Pine Township guide covers the Pine side.
The Route 8 corridor
Route 8 is the spine of the area, connecting Valencia and Middlesex south toward Gibsonia and Richland and north toward Butler. St. Barnabas Medical Center is nearby in Richland Township, with a Gibsonia address.
Taxes follow the township and county. Middlesex is in Butler County, and I compared Butler and Allegheny in my Butler County property tax guide.
If you want to actually look
Because so many townships share the Valencia name, the first step is to confirm the municipality and the school district on the parcel before you fall for a house.
If Valencia or Middlesex Township is on your list, get in touch and I will set up a search and flag the homes worth seeing in person. Selling first? Start with a valuation of your current home, or call me directly at (412) 980-5654.
