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 177 Mbps for download speeds and 28 Mbps for upload speeds for Cox Communications customers over 13,367 recent tests. AT&T and Spectrum also have coverage in San Marcos, although they are not as popular as Cox Communications. These providers offer DSL, fiber, fixed wireless and cable internet service.

See more detailed speed and coverage data below.

Last updated on April 30, 2024
ProviderDownload SpeedUpload SpeedLatency
Cox Communications
Cable
Fiber
View Details →
177 Mbps28 Mbps13 ms
AT&T
DSL
Fiber
Fixed Wireless
View Details →
81 Mbps20 Mbps11 ms
Spectrum
Cable
View Details →
198 Mbps14 Mbps12 ms
* Data from speed tests taken in the last 3 months

Internet Providers in San Marcos, CA

Cox Communications

Cable
Fiber

Download Speed

177Mbps

Upload Speed

28Mbps

Latency

13ms

Overview

Cox Communications is the most popular provider in San Marcos offering cable and fiber internet service. Users have been getting 177 Mbps for download speeds and 28 Mbps for upload speeds over 13,367 recent tests.

Performance Breakdown

Cox Communications has the 2nd fastest average download speed, the fastest average upload speed, and the 3rd lowest latency out of all of the providers in San Marcos. 27% of users saw download speeds between 250-500 Mbps, and 27% of users saw upload speeds between 25-50 Mbps.

Download Speeds

Upload Speeds

Recent Cox Communications Speed Tests in San Marcos

DateDownload SpeedUpload SpeedLatency
April 29, 202438 Mbps25 Mbps571 ms
April 29, 2024121 Mbps25 Mbps9 ms
April 29, 202493 Mbps41 Mbps10 ms
April 29, 2024376 Mbps57 Mbps17 ms
April 29, 2024231 Mbps44 Mbps11 ms
April 29, 202460 Mbps12 Mbps9 ms
April 29, 2024503 Mbps47 Mbps13 ms
April 29, 2024395 Mbps25 Mbps13 ms
April 29, 2024119 Mbps23 Mbps9 ms
April 29, 202415 Mbps20 Mbps16 ms

AT&T

DSL
Fiber
Fixed Wireless

Download Speed

81Mbps

Upload Speed

20Mbps

Latency

11ms

Overview

AT&T is the 2nd most popular provider in San Marcos offering DSL, fiber and fixed wireless internet service. Users have been getting 81 Mbps for download speeds and 20 Mbps for upload speeds over 5,866 recent tests.

Performance Breakdown

AT&T has the 3rd fastest average download speed, the 2nd fastest average upload speed, and the lowest latency out of all of the providers in San Marcos. 20% of users saw download speeds between 250-500 Mbps, and 25% of users saw upload speeds slower than 5 Mbps.

Download Speeds

Upload Speeds

Recent AT&T Speed Tests in San Marcos

DateDownload SpeedUpload SpeedLatency
April 29, 2024192 Mbps172 Mbps5 ms
April 29, 2024184 Mbps151 Mbps5 ms
April 29, 2024531 Mbps411 Mbps6 ms
April 29, 202413 Mbps3 Mbps10 ms
April 29, 2024324 Mbps97 Mbps6 ms
April 29, 2024202 Mbps225 Mbps9 ms
April 29, 2024105 Mbps95 Mbps12 ms
April 29, 202472 Mbps91 Mbps1028 ms
April 29, 2024298 Mbps174 Mbps8 ms
April 29, 202450 Mbps12 Mbps25 ms

Spectrum

Cable

Download Speed

198Mbps

Upload Speed

14Mbps

Latency

12ms

Overview

Spectrum is the 3rd most popular provider in San Marcos offering cable internet service. Users have been getting 198 Mbps for download speeds and 14 Mbps for upload speeds over 4,007 recent tests.

Performance Breakdown

Spectrum has the fastest average download speed, the 3rd fastest average upload speed, and the 2nd lowest latency out of all of the providers in San Marcos. 31% of users saw download speeds between 250-500 Mbps, and 49% of users saw upload speeds between 10-25 Mbps.

Download Speeds

Upload Speeds

Recent Spectrum Speed Tests in San Marcos

DateDownload SpeedUpload SpeedLatency
April 29, 20245 Mbps1 Mbps22 ms
April 29, 202455 Mbps35 Mbps9 ms
April 29, 2024266 Mbps11 Mbps11 ms
April 29, 202493 Mbps11 Mbps11 ms
April 29, 2024257 Mbps40 Mbps14 ms
April 29, 202445 Mbps10 Mbps13 ms
April 29, 2024650 Mbps38 Mbps8 ms
April 29, 2024859 Mbps41 Mbps12 ms
April 29, 2024359 Mbps11 Mbps11 ms
April 29, 202433 Mbps18 Mbps12 ms

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Frequently Asked Questions

What internet providers are available in San Marcos, CA?

Cox Communications, AT&T and Spectrum 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?

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