Xfinity Internet in South Dakota at a Glance
Xfinity from Comcast delivers cable and fiber internet service across South Dakota, reaching households in Sioux Falls, Rapid City, Aberdeen, Brookings, and Watertown and surrounding communities. As the nation's largest cable internet provider, Xfinity offers South Dakota residents download speeds ranging from 75 Mbps to 1.2 Gbps, with plans starting at just $19.99 per month. Whether you are streaming, gaming, or working from home, Xfinity has a plan to match your household's needs in South Dakota. Call 1-844-963-0138 to check availability at your address and get started today.
Xfinity Internet Plans Available in South Dakota
Xfinity offers six core internet plans throughout its South Dakota service area. Pricing reflects standard rates before promotional discounts, which may vary by location. Contact Xfinity at 1-844-963-0138 for the latest promotions available at your South Dakota address.
| Plan Name | Download Speed | Upload Speed | Monthly Price | Data Cap | Contract |
|---|---|---|---|---|---|
| Connect | 75 Mbps | 10 Mbps | $19.99/mo | 1.2 TB | None |
| Connect More | 200 Mbps | 10 Mbps | $35.00/mo | 1.2 TB | None |
| Fast | 400 Mbps | 10 Mbps | $55.00/mo | 1.2 TB | None |
| Superfast | 800 Mbps | 15 Mbps | $65.00/mo | 1.2 TB | None |
| Gigabit | 1,000 Mbps | 20 Mbps | $75.00/mo | 1.2 TB | None |
| Gigabit Extra | 1,200 Mbps | 35 Mbps | $80.00/mo | 1.2 TB | None |
About Xfinity Internet
Xfinity is Comcast Corporation's consumer brand for residential internet, television, and phone services. As the largest cable internet provider in the United States, Xfinity serves tens of millions of homes across 40 states, including significant coverage in South Dakota. The company delivers internet through a hybrid fiber-coaxial (HFC) cable network, with ongoing upgrades to DOCSIS 3.1 and emerging DOCSIS 4.0 technology that enable multi-gigabit speeds over existing cable infrastructure.
In South Dakota, Xfinity's network reaches households across Sioux Falls, Rapid City, Aberdeen, Brookings, Watertown and many surrounding communities. The company has invested in network improvements throughout the state to increase speeds, reduce latency, and improve reliability for subscribers. Xfinity also offers the xFi Gateway modem-router, which provides whole-home Wi-Fi 6 coverage, parental controls, and network security features.
Xfinity Coverage and Availability in South Dakota
Xfinity's South Dakota coverage spans major metropolitan areas and many suburban communities. The cable network is built out most extensively in the state's population centers, where the density of homes makes infrastructure investment most efficient. If you live in or near one of South Dakota's larger cities, there is a strong likelihood Xfinity is available at your address.
Key South Dakota cities served by Xfinity include:
- Sioux Falls, South Dakota
- Rapid City, South Dakota
- Aberdeen, South Dakota
- Brookings, South Dakota
- Watertown, South Dakota
- Mitchell, South Dakota
To confirm Xfinity availability at your specific South Dakota address, call 1-844-963-0138. Coverage can vary block by block, so an address-level check is the most reliable way to verify service.
In areas where Xfinity is not available, South Dakota residents may find coverage from competitors including Midcontinent, CenturyLink, Venture Communications. However, where Xfinity cable is available, it typically delivers faster speeds than DSL alternatives and more consistent performance than fixed wireless or satellite options.
Xfinity Speed Analysis for South Dakota
Xfinity delivers internet to South Dakota homes primarily over its cable network, using DOCSIS 3.1 technology. This technology allows download speeds up to 1.2 Gbps through the Gigabit Extra plan, making Xfinity one of the fastest internet providers available in South Dakota. Cable internet speeds are shared among users on the same node, which means performance can vary during peak usage hours in densely populated neighborhoods.
For most South Dakota households, the Connect More plan at 200 Mbps provides ample bandwidth for streaming video on multiple devices, video conferencing, and general web browsing. Households with four or more connected devices, or those that regularly transfer large files, may benefit from the Fast or Superfast tiers. Gamers and tech professionals in South Dakota often prefer the Gigabit or Gigabit Extra plans for their higher throughput and improved upload speeds.
Upload speeds on Xfinity's cable network range from 10 Mbps on the entry-level plans to 35 Mbps on the Gigabit Extra tier. These upload speeds are adequate for video calls and basic cloud backups but fall short of the symmetric upload speeds offered by fiber-to-the-home providers like Midcontinent. If your South Dakota household requires fast uploads for professional video production, live streaming, or large dataset transfers, compare Xfinity's upload speeds against fiber alternatives available at your address.
Xfinity Pricing and Equipment in South Dakota
Xfinity's South Dakota pricing starts at $19.99 per month for the Connect plan with 75 Mbps download speeds. All Xfinity plans in South Dakota operate without contracts, giving subscribers the flexibility to change plans or cancel service without early termination fees. Promotional pricing may lower monthly costs for the first 12 to 24 months of service.
In addition to the monthly service charge, South Dakota subscribers should budget for equipment costs. Xfinity's xFi Gateway modem-router rental costs $14 per month and includes Wi-Fi 6 capability, device management through the Xfinity app, and advanced security features. Alternatively, subscribers can purchase a compatible DOCSIS 3.1 modem and separate router to avoid the monthly rental fee. Over a 24-month period, buying your own equipment typically saves $200 or more compared to renting.
Xfinity enforces a 1.2 TB monthly data cap in most markets, including most South Dakota service areas. Households that consistently exceed this limit can add unlimited data for an additional $30 per month, or upgrade to the Gigabit Extra plan which may include unlimited data as a promotional offer. For a typical household in South Dakota, 1.2 TB per month is sufficient for approximately 480 hours of HD streaming, well above average usage.
For the latest pricing, promotions, and equipment options available at your South Dakota address, call 1-844-963-0138.
South Dakota Broadband Market Analysis
South Dakota's broadband market is centered on Sioux Falls and Rapid City, where cable infrastructure serves the majority of the population. Xfinity offers speeds significantly faster than the satellite and fixed wireless options available in the state's vast rural areas. South Dakota's growing fintech sector in Sioux Falls drives enterprise-grade broadband demand.
The competitive landscape in South Dakota includes Midcontinent, CenturyLink, Venture Communications, and other regional providers. This competition benefits South Dakota consumers through lower prices, faster speeds, and improved customer service. Xfinity's position as a major cable provider means it can leverage national scale for technology development while maintaining local service teams in South Dakota.
According to FCC broadband data, South Dakota ranks among the states with increasing broadband deployment, particularly in urban and suburban areas. Xfinity's DOCSIS 3.1 network upgrades have contributed to this progress by making gigabit-class speeds available to a growing number of South Dakota households. Future DOCSIS 4.0 deployments may push cable speeds even higher, potentially reaching multi-gigabit symmetric performance.
Xfinity Flex and xFi Gateway in South Dakota
Xfinity internet subscribers in South Dakota who do not bundle TV service receive the Xfinity Flex streaming device at no additional cost. Flex provides access to popular streaming platforms including Peacock, Pluto TV, Tubi, and Xumo, along with integration for paid services like Netflix and Amazon Prime Video. The Flex device supports 4K HDR content and voice remote control.
The xFi Gateway serves as both modem and router, supporting Wi-Fi 6 technology for improved wireless performance in South Dakota homes. The Xfinity app allows subscribers to manage their network remotely, set parental controls, pause device access, and run speed tests. For larger South Dakota homes that need extended coverage, Xfinity offers xFi Pods, which are mesh Wi-Fi extenders that integrate seamlessly with the Gateway to eliminate dead zones.
Frequently Asked Questions About Xfinity in South Dakota
What Xfinity internet speeds are available in South Dakota?
Xfinity offers download speeds from 75 Mbps to 1.2 Gbps in South Dakota, depending on your specific address. Most South Dakota homes in Xfinity's coverage area can access the full range of plans. Call 1-844-963-0138 to check speeds available at your address.
How much does Xfinity internet cost in South Dakota?
Xfinity plans in South Dakota start at $19.99 per month for 75 Mbps and go up to $80 per month for 1.2 Gbps. No contracts are required. Promotional pricing may offer additional savings for new subscribers. Call 1-844-963-0138 for the latest South Dakota promotions.
Does Xfinity have a data cap in South Dakota?
Yes, Xfinity enforces a 1.2 TB monthly data cap in most South Dakota service areas. This is sufficient for most households. If you need more, unlimited data can be added for $30 per month, or it may be included with select plans. Check current South Dakota data cap policies by calling 1-844-963-0138.
Can I use my own modem with Xfinity in South Dakota?
Yes, Xfinity supports customer-owned DOCSIS 3.1 modems in South Dakota. Using your own modem saves the $14 per month xFi Gateway rental fee. Ensure your modem is on Xfinity's approved device list for full compatibility with your South Dakota service plan.
Does Xfinity require a contract in South Dakota?
No, all current Xfinity internet plans in South Dakota are available without contracts. You can change plans or cancel service at any time without incurring early termination fees. Some promotional pricing may have specific term agreements. Call 1-844-963-0138 for details.
Is high-speed internet available in rural South Dakota?
Xfinity's cable network serves South Dakota's larger cities, while rural areas may rely on fixed wireless or satellite. Call 1-844-963-0138 to check if Xfinity is available at your South Dakota address.
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1-877-526-7498Advertising Disclosure: InternetProviders.ai may earn compensation when you click links or call phone numbers on this page. Compensation may influence the order and placement of offers. Not all providers or plans are represented. Information is for educational purposes and may not reflect current offers. The information on this page is current as of February 2026.