Texas · Williamson

78665 ZIP Code

78665 is associated with Round Rock, Texas. The page shows the county, timezone, nearby ZIPs and links to the state hub for a nearby city generator.

ZIP details

ZIP code: 78665
City: Round Rock
State: Texas (TX)
County: Williamson
Timezone: America/Chicago
State sales tax: Varies by state

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Nearby ZIP codes

78664Round Rock, TX 78666San Marcos, TX 78663Round Mountain, TX 78667San Marcos, TX 78662Red Rock, TX 78661Prairie Lea, TX 78669Spicewood, TX 78660Pflugerville, TX

Questions about 78665

What city is ZIP code 78665 in?+

78665 is associated with Round Rock, Texas in the bundled dataset. ZIP areas can cross city and county lines, so use the city and county fields together.

What county is 78665 in?+

Williamson. County boundaries and postal areas are not the same thing; a ZIP can serve addresses in more than one county.

What timezone is 78665 in?+

America/Chicago. This is the IANA timezone name for the city associated with the ZIP.

Is 78665 a real ZIP code?+

It appears in the public city dataset bundled with this site. That confirms the format and city association, not that a specific street, mailbox, or resident exists.

All ZIP codes Validate a full address