Internet providers in San Marcos, California

Where do you need service?

7 providers

  • Spectrum Internet

    Spectrum
    Plans starting at
    $30

    /mo

    for 12 mos.
    Call to learn more
    (844) 451-2720
    Check plans with Spectrum
    Speeds up to
    1000 mbps
    Connection type
    Cable
    Customer rating
    (7,220)
    Available in San Marcos
    55%

  • AT&T Internet

    AT&T
    Plans starting at
    $55

    /mo*

    for 12 mos.
    Call to learn more
    (844) 451-2720
    Check plans with AT&T
    Speeds up to
    5000 mbps
    Connection type
    Fiber
    Customer rating
    (3,832)
    Available in San Marcos
    30%

    **Price after $10/mo discount with eligible Autopay & Paperless bill (w/in 2 bills). Monthly State Cost Recovery Charge in TX, OH, NV applies. Limited availability. May not be available in your area. Call or go to fiber.att.com to see if you qualify. Updated as of 6/4/25. †Speeds based on wired connection. Actual speeds may vary. For more info, go to www.att.com/speed101.

  • Cox Internet

    Cox
    Plans starting at
    $50

    /mo

    for 12 mos.
    Call to learn more
    (844) 451-2720
    Check plans with Cox
    Speeds up to
    2000 mbps
    Connection type
    Fiber
    Customer rating
    (1,517)
    Available in San Marcos
    96%

  • Spectrum Internet

    Spectrum
    Plans starting at
    $30

    /mo

    for 12 mos.
    Call to learn more
    (844) 451-2720
    Check plans with Spectrum
    Speeds up to
    1000 mbps
    Connection type
    Cable
    Customer rating
    (7,220)
    Available in San Marcos
    55%

  • T-Mobile Internet

    T-Mobile
    Plans starting at
    $35

    /mo

    for 12 mos.
    Call to learn more
    (844) 451-2720
    Check plans with T-Mobile
    Speeds up to
    415 mbps
    Connection type
    Wireless
    Customer rating
    (1,651)
    Available in San Marcos
    90%

  • Verizon 5G Internet

    Verizon 5G
    Plans starting at
    $50

    /mo*

    for 12 mos.
    Call to learn more
    (844) 451-2720
    Check plans with Verizon
    Speeds up to
    1000 mbps
    Connection type
    Wireless
    Customer rating
    (452)
    Available in San Marcos
    94%

    *with a mobile unlimited plan that includes 5G Ultra Wideband. With Auto Pay + Paperless billing.

  • Verizon 4G Internet

    Verizon 4G
    Plans starting at
    $50

    /mo

    for 12 mos.
    Call to learn more
    (844) 451-2720
    Check plans with Verizon
    Speeds up to
    50 mbps
    Connection type
    Wireless
    Available in San Marcos
    94%

  • Hughesnet Internet

    Hughesnet
    Plans starting at
    $49

    99/mo*

    for 12 mos.
    Call to learn more
    (844) 451-2720
    Check plans with Hughesnet
    Speeds up to
    100 mbps
    Connection type
    Satellite
    Customer rating
    (310)
    Available in San Marcos
    100%

    ***Monthly Fee reflects the applied $5 savings for ACHⓘ enrollment. Enroll before the 2nd billing cycle for continued savings. Service plans require a 24-month commitment. Equipment Lease or Purchase fees extra.

1-7 of 7 providers shown

Table of contents

What's the right internet speed for your home?

Households within San Marcos are, on average, getting download speeds of 232 Mbps and upload speeds of 90 Mbps. The Federal Communications Commission (FCC) assigns internet requirements into light, moderate and high-use categories.

Our online speed guide can help you decide which internet speed is best for your household.

  • Light
    Internet use
    1 to 2

    Email, browsing, basic video, one streaming device at a time.

    Broadband guidelines:

    1 to 2 devices:
    5 to 20 Mbps
    2 to 4 devices:
    20 to 40 Mbps
    5 to 10 devices:
    50 to 100 Mbps
  • Moderate
    Internet use
    3 - 4

    The same functions as Light, plus one high-demand application like streaming HD video, video conferencing, online gaming or telecommuting.

    Broadband guidelines:

    1 to 2 devices:
    5 to 20 Mbps
    2 to 4 devices:
    20 to 40 Mbps
    5 to 10 devices:
    75 to 200 Mbps
  • High
    Internet use
    5+

    The same functions as Light and Moderate, plus multiple high-demand applications running simultaneously.

    Broadband guidelines:

    1 to 2 devices:
    100 to 200 Mbps
    2 to 4 devices:
    200 to 300 Mbps
    5 to 10 devices:
    400 to 500 Mbps

DON'T KNOW WHAT INTERNET SPEED YOU NEED?

Find the speed you need with our internet speed quiz

Take the quiz

Best internet provider in San Marcos, CA

Allconnect's choice for the best internet provider in San Marcos is Verizon 5G Home, with their Wireless plans covering 94% of the city. Verizon 5G Home internet plans start at $50 with speeds up to 1,000 Mbps.

To make that choice, we look at the affordability, performance, value and customer satisfaction of internet service providers (ISPs). View our full methodology here.

verizon-5g-terrestrial-wireless
Plans starting at
$50/mo.
Available speeds
300-1,000 Mbps
Contract length
None
Call to order: (844) 451-2720
Check plans with Verizon

Cheap internet in San Marcos

Most internet service providers offer cheap internet plans between $20-$30, for the lowest tier of speed, usually up to 75-100 Mbps. These plans are fast enough for light use in a small household.

Spectrum has the cheapest internet plans in San Marcos, starting at 100 Mbps for $30/mo.

T-Mobile also has an affordable internet plan offering 318 Mbps for $35/mo.

Keep in mind that for just $5 or $10 extra a month, the second-to-cheapest plan offered by an ISP is sometimes the better deal, often providing more speed for your dollar.

Cheapest plans

Spectrum
Cheapest Plan
Spectrum logo
Monthly price
$30.00/mo.
Download speed
Up to 100 Mbps
Contract length
None
Connection type
Cable
Call to order
(844) 451-2720
T-Mobile
Next Best Plan
T-Mobile logo
Monthly price
$35.00/mo.
Download speed
Up to 318 Mbps
Contract length
None
Connection type
Wireless
Call to order
(844) 451-2720

Fastest internet in San Marcos

The speed you need depends on what you use the internet for. If high-speed internet is necessary for your household to game, work and learn, you'll be happy to know that AT&T and Cox offer the fastest internet in San Marcos.

AT&T has Fiber internet speeds starting at $245.00/mo. for up to 5,000 Mbps while Cox offers plans up to 2,000 Mbps for their Fiber internet.

Fastest plans

AT&T
Fastest Plan
AT&T logo
Monthly price
$245.00/mo.
Download speed
Up to 5,000 Mbps
Contract length
None
Connection type
Fiber
Call to order
(844) 451-2720
Cox
Next Best Plan
Cox logo
Monthly price
$140.00/mo.
Download speed
Up to 2,000 Mbps
Contract length
None
Connection type
Fiber
Call to order
(844) 451-2720

Provider coverage map for San Marcos

Looking for internet service in San Marcos? Check out this map to see the availability of internet providers in your area.

is available at % of homes in San Marcos, CA.

View plans

Most available internet providers in San Marcos

The most available ISPs in San Marcos is Hughesnet, which serves 100% of the area, with plans starting at $49.99/mo.

Verizon 5G Home covers 94% of San Marcos, with plans beginning at $50.00/mo.

Satellite and 5G home internet are available in nearly 99% of the country, so if cable or fiber internet isn't available at your San Marcos address, you probably can connect to another internet type.

Most available plans

Hughesnet
Most Available Plan
Hughesnet logo
Monthly price
$49.99/mo.
Download speed
50 Mbps
Contract length
24 mos.
Connection type
Satellite
Call to order
(844) 451-2720
Verizon 5G Home
Next Best Plan
Verizon 5G Home logo
Monthly price
$50.00/mo.
Download speed
1,000 Mbps
Contract length
None
Connection type
Wireless
Call to order
(844) 451-2720

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San Marcos internet FAQs

What's the cheapest internet provider in San Marcos?

Spectrum offers the cheapest internet plan in San Marcos with plans starting at $30.00/mo. for 100 Mbps.

T-Mobile also offers cheap plans starting at $35.00/mo. for 318 Mbps.

At $0.05 per Mbps the AT&T Fiber 5 GIG speed plan from AT&T gives you the most value for your dollar.

The fastest internet provider in San Marcos is AT&T. It has Fiber internet plans with speeds up to 5,000 Mbps. Cox also has fast Fiber plans up to 2,000 Mbps.

In most cases, your initial cost of buying a modem and router pays for itself within a year. Rental equipment fees from internet providers are usually around $10/mo. and you can buy combination modem/routers (gateways) for under $100. If you want to avoid a monthly fee from your ISP, buying your router is the way to go. If you need support for your equipment, rent it from your ISP and you’ll have access to technical support. See our full guide on whether you should rent or buy internet equipment.

Once you have compared and chosen an internet provider, you often have the choice to install your internet yourself or have the ISP send a tech to your address. If you install it yourself, the ISP will provide you with a step-by-step guide to connect their equipment to yours and set up your Wi-Fi access. If you choose professional installation, all you’ll have to do is schedule an appointment with your ISP and they’ll take care of everything.

When choosing an internet service provider, it’s important to consider technology types. Fiber internet is the fastest and most reliable internet technology type since it provides symmetrical download and upload speeds, but it’s not the most widely available type of internet. We recommend fiber if it’s available at your address, but if not, you have other options.

Cable internet is a common internet type and the best alternative to fiber internet. It offers fast, reliable speeds and is more widely available than fiber. Satellite internet is a great choice if you live in a rural area and other internet technologies aren’t an option.

5G internet, or fixed wireless internet, is another internet technology type to consider. 5G home internet isn’t always as fast as cable or fiber plans, but some providers like T-Mobile are expanding rapidly to offer 5G home internet service to most of the country and can reach speeds up to 245 Mbps.

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