Internet Speeds in San Marcos, CA

San Marcos residents have 3 internet providers to choose from. Cox Communications is the most popular provider, offering cable and fiber internet service. In our research, we have been seeing 153 Mbps for download speeds and 11 Mbps for upload speeds for Cox Communications customers over 12,016 recent tests. Spectrum and AT&T also have coverage in San Marcos, although they are not as popular as Cox Communications. These providers offer cable, DSL, fiber and fixed wireless internet service.

See more detailed speed and coverage data below.

Last updated on June 4, 2023
ProviderDownload SpeedUpload SpeedLatency
Cox Communications
Cable
Fiber
View Details →
153 Mbps11 Mbps11 ms
Spectrum
Cable
View Details →
156 Mbps11 Mbps14 ms
AT&T
DSL
Fiber
Fixed Wireless
View Details →
86 Mbps47 Mbps13 ms
* Data from speed tests taken in the last 3 months

Internet Providers in San Marcos, CA

Cox Communications

Cable
Fiber

Download Speed

153Mbps

Upload Speed

11Mbps

Latency

11ms

Overview

Cox Communications is the most popular provider in San Marcos offering cable and fiber internet service. Users have been getting 153 Mbps for download speeds and 11 Mbps for upload speeds over 12,016 recent tests.

Performance Breakdown

Cox Communications has the 2nd fastest average download speed, the 2nd fastest average upload speed, and the lowest latency out of all of the providers in San Marcos. 24% of users saw download speeds between 250-500 Mbps, and 35% of users saw upload speeds between 10-25 Mbps.

Download Speeds

Upload Speeds

Recent Cox Communications Speed Tests in San Marcos

DateDownload SpeedUpload SpeedLatency
June 3, 20235 Mbps4 Mbps13 ms
June 3, 202397 Mbps11 Mbps19 ms
June 3, 2023268 Mbps6 Mbps12 ms
June 3, 2023197 Mbps8 Mbps19 ms
June 3, 2023101 Mbps29 Mbps27 ms
June 3, 2023275 Mbps12 Mbps21 ms
June 3, 20237 Mbps4 Mbps37 ms
June 3, 202396 Mbps26 Mbps31 ms
June 3, 2023234 Mbps103 Mbps12 ms
June 3, 2023255 Mbps50 Mbps11 ms

Spectrum

Cable

Download Speed

156Mbps

Upload Speed

11Mbps

Latency

14ms

Overview

Spectrum is the 2nd most popular provider in San Marcos offering cable internet service. Users have been getting 156 Mbps for download speeds and 11 Mbps for upload speeds over 11,398 recent tests.

Performance Breakdown

Spectrum has the fastest average download speed, the 3rd fastest average upload speed, and the 3rd lowest latency out of all of the providers in San Marcos. 30% of users saw download speeds between 250-500 Mbps, and 59% of users saw upload speeds between 10-25 Mbps.

Download Speeds

Upload Speeds

Recent Spectrum Speed Tests in San Marcos

DateDownload SpeedUpload SpeedLatency
June 3, 202357 Mbps11 Mbps16 ms
June 3, 20239 Mbps7 Mbps57 ms
June 3, 2023114 Mbps11 Mbps13 ms
June 3, 2023286 Mbps22 Mbps10 ms
June 3, 202340 Mbps11 Mbps13 ms
June 3, 2023544 Mbps22 Mbps14 ms
June 3, 2023128 Mbps12 Mbps13 ms
June 3, 2023417 Mbps22 Mbps14 ms
June 3, 2023172 Mbps11 Mbps14 ms
June 3, 202322 Mbps11 Mbps14 ms

AT&T

DSL
Fiber
Fixed Wireless

Download Speed

86Mbps

Upload Speed

47Mbps

Latency

13ms

Overview

AT&T is the 3rd most popular provider in San Marcos offering DSL, fiber and fixed wireless internet service. Users have been getting 86 Mbps for download speeds and 47 Mbps for upload speeds over 5,697 recent tests.

Performance Breakdown

AT&T has the 3rd fastest average download speed, the fastest average upload speed, and the 2nd lowest latency out of all of the providers in San Marcos. 22% of users saw download speeds between 50-100 Mbps, and 19% of users saw upload speeds faster than 250 Mbps.

Download Speeds

Upload Speeds

Recent AT&T Speed Tests in San Marcos

DateDownload SpeedUpload SpeedLatency
June 3, 2023617 Mbps605 Mbps18 ms
June 3, 2023659 Mbps677 Mbps18 ms
June 3, 2023104 Mbps91 Mbps18 ms
June 3, 2023105 Mbps79 Mbps20 ms
June 3, 202353 Mbps46 Mbps18 ms
June 3, 20233 Mbps1 Mbps38 ms
June 3, 2023297 Mbps192 Mbps13 ms
June 3, 202347 Mbps9 Mbps22 ms
June 3, 2023346 Mbps602 Mbps11 ms
June 3, 202371 Mbps5 Mbps24 ms

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Frequently Asked Questions

What internet providers are available in San Marcos, CA?

Cox Communications, Spectrum and AT&T currently operate in San Marcos.

What is the most popular internet provider in San Marcos, CA?

Cox Communications is currently the most popular internet provider in San Marcos based on the number of speed tests in the last 3 months.

What is the fastest internet provider in San Marcos, CA?

The fastest internet provider for you is going to differ based on your needs, and which providers actually serve your home. However, when it comes to the real speeds users in San Marcos are getting, Spectrum provides the fastest download and upload speeds.

Is there fiber internet in San Marcos, CA?

AT&T and Cox Communications provide fiber internet in San Marcos.