78665Round Rock, TX

Prospecting data for 78665: Round Rock, TX

Name: Prospecting data for 78665: Round Rock, TX
Creator: Prospecting Data
License: https://prospectingdata.com/about/

Zip 78665 in Round Rock, Texas has about 15,800 homeowners. About 5,150 have a connected mobile phone and 2,140 of those are clear of the National Do Not Call Registry.

Data as of 2026-09Williamson County

Absentee owners 78665

Data as of 2026-09

Absentee owners2,640
Mailable address97%2,560
Connected mobile8%200
Email on file8%200
Mobile and DNC clear3%under 100

Rounded floors, not promises.

Who lives here
Population	49,100
Housing units	16,100
Owner occupied	71% of occupied homes
Renter occupied	29% of occupied homes
Median household income	$96,000
Median age	33.7
Built before 1970	1% of homes
Built 2000 or later	79% of homes
Median mortgage payment	$1,920 a month
Time zone	CST
Area code	512

Census figures are rounded ACS 5-year estimates for the zip code tabulation area.

What this means for each channel

Direct mail reaches almost everyone: 97% of 78665 homeowners have a deliverable mailing address. Mail is the only channel with no consent requirement, so it is the floor of any Round Rock campaign.

Calling and texting reach about 32% with a connected mobile, but only 14% once you remove numbers on the National Do Not Call Registry. Texting a cold list also needs prior express written consent under the TCPA, so the DNC-clear figure is a calling figure, not a texting figure. See cold calling laws by state.

Email reaches about 40%. Cold email to consumers is legal under CAN-SPAM with an opt-out and a physical address, but deliverability on purchased consumer email is poor; treat it as a supporting touch.

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