Canonsburg's best-known export is a singing voice. Perry Como was born in this borough in 1912 and was cutting hair on Pike Street before he ever cut a record; Bobby Vinton was born here in 1935; the Four Coins came out of the same handful of streets. A town of roughly nine thousand people with that much sheet music behind it also stages one of the largest Fourth of July parades in Pennsylvania, which is a useful thing to know about a place before you send it a birthday present — Canonsburg does not need to be talked into a celebration. The practical consequence for an order is that this is a market with a genuine main street, and the main street is where the flowers come from. Landm Flower Shop at 42 W. Pike St. is the only bench inside the borough, sitting at zero miles from the 15317 centroid, in the middle of the Pike Street business district rather than out on a highway strip. For a porch in the old borough grid, a front desk at Southpointe, or a room at the hospital on Medical Boulevard, that is the shortest run on the board. It is also one of the rarer American delivery patterns: short blocks, sidewalks, rear alleys and front porches that face the street, so a driver here hands a bouquet to a person instead of leaving it at a gate.
Houses are the other half of the volume, and one boundary catches almost every out-of-town sender: ZIP 15317 is not just Canonsburg. It also covers McMurray and most of Peters Township, plus the Cecil Township side and Southpointe, which means two recipients with identical ZIPs can be eight miles and two school districts apart. Inside the borough and the coal-patch villages around it — Strabane, Houston (15342), Muse (15350), Cecil (15321), Lawrence, Meadow Lands — the housing is frame singles, duplexes and rows on tight streets above Chartiers Creek, with porches, visible front doors and steep hillside blocks that reward a driver who knows the alleys. Peters Township and McMurray are the opposite shape: newer subdivisions off Washington Road and East McMurray Road, deep setbacks, cul-de-sacs, and garages instead of porches, where a recipient mobile number is worth more than the street address. North of that the South Hills band takes over — Bethel Park (15102), Upper St. Clair (15241), Mt. Lebanon (15228), Dormont (15216), Bridgeville (15017), Carnegie (15106), South Park and Library (15129) — a mix of dense post-war streets a driver can clear fast and apartment and condo buildings along Route 19 and West Liberty Avenue where a unit number and a leasing-office hand-off are mandatory. The southern arc runs to Washington (15301), Eighty Four (15330), Venetia (15367), Finleyville (15332) and McDonald (15057). Add one Pennsylvania fact: from December into March a bouquet crossing a parking lot in single-digit cold needs to be sleeved and moved quickly, so a call-ahead number matters more in February than in June.