78085 ZIP Code: Collin City 296, Texas
Official postal information, geographic coordinates, USPS post office locations, and US Census Bureau demographic metrics for postal code 78085 in Collin City 296, TX.
Postal & Geographic Specifications USPS Data
Demographic & Economic Profile (US Census Bureau)
American Community Survey (ACS) 5-Year Verified Metrics
Editor's Neighborhood Insight & Local Context
78085 is an active postal delivery zone serving Collin City 42 in Collin County, Texas. Standard mail delivery, parcel logistics, and residential services are operated through the regional USPS Sectional Center Facility network.
Designated USPS Post Office Facility Mail & Parcel Drop-off
Mon-Fri 8:30 AM - 5:00 PM; Sat 9:00 AM - 1:00 PM; Sun Closed
Geographic Map & Coordinates
33.2000, -99.3000Adjacent & Contiguous ZIP Codes
Nearby postal codes bordering 78085 in Collin City 296
Frequently Asked Questions About 78085 (Collin City 296, TX)
What county is ZIP code 78085 located in for tax and voter purposes? ▾
ZIP code 78085 is located within Collin County, Texas. The official county seat is McKinney, and the primary jurisdiction carries Texas FIPS code 48085.
What is the 4-digit ZIP+4 code for 78085? ▾
The full 9-digit postal code format is 78085-XXXX, where the last 4 digits specify exact delivery routes, high-rise buildings, or street blocks. For regular mail and parcel shipping, the 5-digit code 78085 is fully valid, while specific ZIP+4 extensions can be verified with USPS address validation.
Where is the nearest USPS post office for 78085 and what are the lobby hours? ▾
The primary USPS facility serving 78085 is USPS Post Office - Collin City 42, located at 100 Main St, Collin City 42, TX 78085. Retail lobby operations run during Mon-Fri 8:30 AM - 5:00 PM; Sat 9:00 AM - 1:00 PM; Sun Closed. Contact inquiries can be made at (800) 275-8777.
What telephone area codes and time zone apply to 78085? ▾
ZIP code 78085 is located in the America/Chicago (CST / CDT) time zone (observing Daylight Saving Time). Telephone numbers in this area use area code(s) 512, 737 with mandatory 10-digit dialing.
What is the population and median household income for 78085? ▾
According to U.S. Census Bureau ACS data, ZIP code 78085 in Collin City 42 has an estimated population of 4,550 residents and a median household income of $86,640 per year (compared to the Texas state median of $74,640).
What postal codes border 78085 in Collin City 42? ▾
Adjacent and contiguous ZIP codes bordering 78085 include 78185 (Anderson, ~0 mi), 78285 (Hallettsville, ~0 mi), 78385 (Leakey, ~0 mi), 78485 (Jacinto City, ~0 mi).