In St. Mary Parish, you’ll select from 4 mobile wireless carriers listed below. 99.6% of St. Mary Parish’s land area is covered by some kind of wireless service, as are 100.00% of St. Mary Parish’s 49,406 residents. 5G reception covers up to 99.61% of people while they are sitting at home. Note that we may have a financial relationship with some of the St. Mary Parish providers below. This does not influence what data we show, and helps us provide high-quality, detailed information for free.
St. Mary Parish, LA Top Cell Providers
Starter Phones Designed for Child Safety
Coverage:
T-Mobile Network
Data Speeds:
Same as T-Mobile below
Plans start at $29/mo.
View plans
Built-in Parental Controls | Approved Contacts Only | Parent-Controlled Internet Access
Plans include 5G where available.
Coverage:
T-Mobile Network
Data Speeds:
Same as T-Mobile below
Plans start at $15/mo.
View plans
Mint Mobile provides very affordable plans using the same network as T-Mobile throughout the United States. Learn more about Mint vs. other carriers.
T-Mobile 5G available in St. Mary Parish
Coverage:
99.92% of St. Mary Parish
97.12% of the USA
Data Speeds:
5G: 97.32% 4G: 93.11% 3G or 2G: 99.46%
More about T-Mobile in St. Mary Parish
T-Mobile Data Speeds and Coverage in St. Mary Parish
T-Mobile covers 99.92% of homes in the county with mobile data. The fastest cellular data speed available is 5G. Coverage by homes and land mass (the % of acres with cell coverage versus the total acreage in St. Mary Parish) is shown below.
Tech |
% Homes |
% Land |
|---|---|---|
5G |
97.32% |
77.91% |
4G |
93.11% |
54.05% |
2G or 3G |
99.46% |
82.25% |
5G is the fastest wireless internet and data speed for 97.32% of homes. 4G is the fastest cell coverage for 0.00% of homes. 0.00% of homes can only receive 2G or 3G data. We rank T-Mobile as #2 out of 4 for a combination of coverage and speed among St. Mary Parish mobile providers.
T-Mobile Voice Quality in St. Mary Parish
5G voice quality can be very clear, and is available to 97.32% of homes. 4G voice is considered HD, and is available at 99.23% of St. Mary Parish homes. 99.68% of homes can make calls using older 2G or 3G voice technology.
Coverage:
99.98% of St. Mary Parish
96.15% of the USA
Data Speeds:
4G: 99.98% 3G or 2G: 99.98%
More about Verizon Wireless in St. Mary Parish
Verizon Wireless Data Speeds and Coverage in St. Mary Parish
Verizon Wireless covers 99.98% of homes in the county with mobile data. The fastest cellular data speed available is 4G. Coverage by homes and land mass (the % of acres with cell coverage versus the total acreage in St. Mary Parish) is shown below.
Tech |
% Homes |
% Land |
|---|---|---|
4G |
99.98% |
95.32% |
2G or 3G |
99.98% |
90.17% |
4G is the fastest cell coverage for 99.98% of homes. 0.00% of homes can only receive 2G or 3G data. We rank Verizon Wireless as #3 out of 4 for a combination of coverage and speed among St. Mary Parish mobile providers.
Verizon Wireless Voice Quality in St. Mary Parish
4G voice is considered HD, and is available at 99.98% of St. Mary Parish homes. 99.98% of homes can make calls using older 2G or 3G voice technology.
AT&T Wireless 5G available in St. Mary Parish
Coverage:
100.00% of St. Mary Parish
96.67% of the USA
Data Speeds:
5G: 99.06% 4G: 99.99% 3G or 2G: 100.00%
1-833-652-2264
More about AT&T Wireless in St. Mary Parish
AT&T Wireless Data Speeds and Coverage in St. Mary Parish
AT&T Wireless covers 100.00% of homes in the county with mobile data. The fastest cellular data speed available is 5G. Coverage by homes and land mass (the % of acres with cell coverage versus the total acreage in St. Mary Parish) is shown below.
Tech |
% Homes |
% Land |
|---|---|---|
5G |
99.06% |
57.42% |
4G |
99.99% |
86.10% |
2G or 3G |
100.00% |
99.19% |
5G is the fastest wireless internet and data speed for 99.06% of homes. 4G is the fastest cell coverage for 0.00% of homes. 0.00% of homes can only receive 2G or 3G data. We rank AT&T Wireless as #1 out of 4 for a combination of coverage and speed among St. Mary Parish mobile providers.
AT&T Wireless Voice Quality in St. Mary Parish
5G voice quality can be very clear, and is available to 99.06% of homes. 4G voice is considered HD, and is available at 100.00% of St. Mary Parish homes. 100.00% of homes can make calls using older 2G or 3G voice technology.
Coverage percentages on this page are based on the percent of St. Mary Parish homes that would be covered by cellular service of any kind, unless specified as St. Mary Parish land area.
Fastest Cell Service Down to the St. Mary Parish Neighborhood
The map below shows where Verizon, AT&T, or T-Mobile are faster in St. Mary Parish, LA. Areas with no clear winner are shown as ties.
Overall, St. Mary Parish ranks #666 out of 1597 counties for the fastest mobile internet network speeds in Louisiana.

Best St. Mary Parish Cell Provider Key
The southeastern parts of the county feature better overall coverage for faster data. The opposite is true in the western areas of St. Mary Parish where mobile data speeds are generally slower.
Best Coverage & Data Speeds in St. Mary Parish, LA: AT&T Wireless
Among the largest cell phone companies in the United States, AT&T Wireless has the best speed and coverage in St. Mary Parish. AT&T Wireless has 5G that covers 99.06% of the county. Cell service of any type reaches 100.00% of St. Mary Parish homes.
Cheap Options for Mobile Service in St. Mary Parish, LA
If the price of a St. Mary Parish mobile plan is a major concern for you, cheaper mobile plans are available as well. There are several options available in St. Mary Parish including pre-paid, no-contract plans that start as low as $15 per line. Many of these providers such as Mint, Boost, and Cricket partner with the three major carriers to provide excellent coverage nationwide. With these discount options, the price of your St. Mary Parish wireless plan will quickly rise if you add additional lines or features such as a hotspot or unlimited data.
Plans include 5G where available.
Coverage:
T-Mobile Network
Data Speeds:
Same as T-Mobile above
Plans start at $15/mo.
View plans
Mint Mobile provides very affordable plans using the same network as T-Mobile throughout the United States.
These providers all offer excellent coverage at a lower price compared to more well-known brands. Mint is generally regarded as the most affordable provider for unlimited data, with a high "throttle cap" of 35GB. Depending on where you live, you may prefer the AT&T network coverage offered by Cricket. Boost is a good option for international travelers.
Local Mobile Providers in St. Mary Parish, LA
The companies below provide service to areas smaller than the entire United States. For example, they may have a cell tower in St. Mary Parish, and then partner with larger national companies to provide national service for traveling customers. We display network partners to the best of our ability but cannot guarantee coverage or charges outside of St. Mary Parish and the providers’ coverage areas.
Coverage:
2.14% of St. Mary Parish
0.00% of the USA
Data Speeds:
4G: 2.14% 3G or 2G: 2.14%
More about Tampnet in St. Mary Parish
Tampnet Data Speeds and Coverage in St. Mary Parish
Tampnet covers 2.14% of homes in the county with mobile data. The fastest cellular data speed available is 4G. Coverage by homes and land mass (the % of acres with cell coverage versus the total acreage in St. Mary Parish) is shown below.
Tech |
% Homes |
% Land |
|---|---|---|
4G |
2.14% |
6.65% |
2G or 3G |
2.14% |
6.65% |
4G is the fastest cell coverage for 2.14% of homes. 0.00% of homes can only receive 2G or 3G data. We rank Tampnet as #4 out of 4 for a combination of coverage and speed among St. Mary Parish mobile providers.
Tampnet Voice Quality in St. Mary Parish
4G voice is considered HD, and is available at 2.14% of St. Mary Parish homes. 2.14% of homes can make calls using older 2G or 3G voice technology.
St. Mary Parish, LA Mobile Network Coverage Maps | Voice, 4G & 5G

St. Mary Parish Fastest Speeds Key
Your mobile coverage in St. Mary Parish may vary based on your provider and location. The map above shows the fastest mobile data speeds in and around the county. To see coverage for an individual provider, click the provider's availability maps above.
There are several types of mobile coverage to consider when evaluating a carrier’s geographic reliability. 5G is the fastest mobile data connection in St. Mary Parish covering 99.61% of homes in the area while 4G covers 100.00% of the county. Overall, 100.00% of homes (49,406 people) and 99.6% of the land (553.8 square miles) are covered by some form of cell technology.
5G Coverage Map and Availability in St. Mary Parish

St. Mary Parish 5G Coverage Key
5G is currently the most advanced network available with speeds several times faster than 4G. 5G networks in St. Mary Parish cover 99.61% of homes with 5G voice and data. In total 81.69% or 454.1 square miles of St. Mary Parish are covered by 5G. The best 5G coverage in St. Mary Parish comes from AT&T Wireless with 99.06% coverage.
4G Coverage Map and Availability in St. Mary Parish

St. Mary Parish 4G Coverage Key
4G/LTE networks have become one of the nation’s most common mobile coverage types for data, and in some locations, voice calls. In St. Mary Parish, 100.00% of the area is covered by 4G data, and 100.00% is covered by 4G HD voice service. AT&T Wireless has the best 4G network in St. Mary Parish with 100.00% coverage.
Selecting the Best Cell Provider in St. Mary Parish for You
If you’re still struggling to choose a cell phone provider in the county, some of these facts may help you decide:
- Coverage to St. Mary Parish houses is best with service from AT&T Wireless, with 100.00% of homes covered.
- The best coverage across all St. Mary Parish land is provided by AT&T Wireless at 99.19% of land area covered.
- The current best 5G coverage comes from AT&T Wireless reporting 99.06% in St. Mary Parish.
- The top estimated average speed in St. Mary Parish, estimated at 70.33, Mbps is available through AT&T Wireless.
Mobile Service Counties Near St. Mary Parish
If you live near St. Mary Parish but aren’t technically in the county, or you like to explore the region a lot, your coverage availability and speeds may vary.
Enter your zip code here to find more precise mobile numbers on your exact location. Here are our mobile and cell phone guides for several popular locations in and around St. Mary Parish:
Counties close to St. Mary Parish
- Assumption Parish, LA: worse coverage
- Iberia Parish, LA: better coverage
- Iberville Parish, LA: worse coverage
- Terrebonne Parish, LA: better coverage
- St. James Parish, LA: better coverage
- Lafourche Parish, LA: worse coverage
- Ascension Parish, LA: better coverage
- St. Martin Parish, LA: worse coverage
- Vermilion Parish, LA: better coverage
- Lafayette Parish, LA: better coverage
Counties with similar populations to St. Mary Parish
- Cortland County, NY: worse coverage
- Upshur County, TX: worse coverage
- Val Verde County, TX: worse coverage
- Vance County, NC: worse coverage
- Vega Baja Municipio, PR: better coverage
- Venango County, PA: worse coverage
- Waldo County, ME: worse coverage
- Warren County, TN: worse coverage
- Delaware County, OK: worse coverage
- Darke County, OH: worse coverage








