Internet Providers in San Marcos

San Marcos has multiple fiber providers, including Spectrum and Astound. Symmetric speeds of 8,000 Mbps are available in parts of San Marcos.

Fiber

Provider	DownDownload (Mbps)	UpUpload (Mbps)	AvailabilityCoverage
Hotwire Communications	8,000	8,000	20%
Astound	1,500	1,500	76%
Spectrum	1,000	1,000	81%
Brightspeed	1,000	1,000	12%

Cable

Provider	DownDownload (Mbps)	UpUpload (Mbps)	AvailabilityCoverage
Spectrum	1,000	1,000	99%
Astound	1,500	50	95%

DSL

Provider	DownDownload (Mbps)	UpUpload (Mbps)	AvailabilityCoverage
Brightspeed	100	10	98%

Fixed Wireless

Provider	DownDownload (Mbps)	UpUpload (Mbps)	AvailabilityCoverage
VTX Communications	400	50	97%
Verizon	300	20	99%
T-Mobile	100	20	99%
MINTernet	100	20	97%
AT&T	100	20	79%

Next-Gen Satellite

Provider	DownDownload (Mbps)	UpUpload (Mbps)	AvailabilityCoverage
Starlink	280	30	100%

Old-School Satellite

Provider	DownDownload (Mbps)	UpUpload (Mbps)	AvailabilityCoverage
Viasat	150	3	100%
HughesNet	50	5	100%

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Low-Availability Internet Options

Provider	TechnologyTech	Download (Mbps)	Upload (Mbps)	AvailabilityCoverage
Frontier	Fiber	7,000	7,000	2%
Centric Fiber	Fiber	1,000	1,000	1%
Guadalupe Valley Electric Coop	Fixed WirelessFixed Wireless	100	20	0.4%

Broadband Map's availability estimates are based on the census boundaries of San Marcos. Speed metrics capture internet providers' maximum advertised speeds. Both may be overoptimistic.

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Data Sourcing

Broadband Map's listings of internet providers in San Marcos rely primarily on the May 2026 release from the FCC's Broadband Data Collection program (representing San Marcos ISPs' availability as of December 2025).