Looking for the best fiberglass pool design in 2026? Based on installations by independently owned and operated companies that install River Pools fiberglass pools, these designs are leading the way heading into 2026.
If you’re early in your research and wondering where to start, this list gives you a clear baseline. These are the designs homeowners consistently choose when they’re ready to move forward.
So what makes certain fiberglass pool designs rise to the top while others don’t?
Let’s look at the traits they all have in common.
What Makes a Fiberglass Pool Design Popular?
At the end of the day, choosing a pool really comes down to personal preference. Every backyard is different. Every family uses their pool a little differently.
That said, when homeowners start narrowing down fiberglass pool designs, a few priorities tend to rise to the surface:
- Balanced shallow-to-deep profile.
- Efficient use of backyard space.
- Built-in features that add lifestyle value.
Preference always plays a role. Still, certain fiberglass pool models keep rising because they strike the right balance for a lot of families.
We’ll walk through the designs leading the way this year, and at the end, we’ll also share the color choices homeowners are gravitating toward most as we head into 2026.
So which fiberglass pool designs are setting the pace?
Let’s count them down.
#5 Flat-Bottom Pools
While they weren’t the clear frontrunners all year, flat-bottom fiberglass pools started picking up significant traction late in 2025.
That momentum tells us they’re likely to be extremely popular in 2026.
Here are the flat-bottom pool models we currently offer:
The A Series
The A Series focuses on open, flat-bottom space with a larger footprint. It works well for families who want room to move, float, and gather without depth transitions.
The N Series
The N Series takes a more compact approach. Designed for smaller backyards, this modern plunge-style fiberglass pool delivers the same flat-bottom concept in a tighter footprint that won’t dominate the yard.
Pros
- Consistent depth throughout
- Great for games and group use
- No deep-end drop-off
- Simple, open layout
Cons
- Not designed for diving
- Less depth variation
- May not suit homeowners wanting a traditional shallow-to-deep profile
#4 Rectangular Pools with Tanning Ledge and Integrated Spa
This layout continues to gain attention because it combines swim space and built-in relaxation in one cohesive design.
Homeowners looking for defined zones, without adding separate features, are gravitating toward this style.
In this category, the X36 is the model that brings all of these elements together.
The X36
The X36 tends to grab attention quickly, and for good reason. It combines a sleek rectangular layout with an integrated spa and spillway, plus a built-in tanning ledge, all within one cohesive design. The spacious interior still allows for comfortable swim space, while the spa and ledge create dedicated areas for lounging.
Because it’s auto-cover ready, it fits well in modern backyard setups and appeals to homeowners thinking long-term about safety and convenience.
Demand for this layout has been strong enough that a smaller version, the X32, is being introduced later this year for tighter backyard spaces.
Pros
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Tanning ledge and spa built into one design
- Automatic Cover Compatible
- Clean, modern rectangular look
Cons
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Not ideal if you prefer a freeform shape
- Integrated spa can add additional equipment costs
- Less open swim space than a standard rectangle design
#3 Freeform Pools with Tanning Ledge
Curved layouts remain popular with homeowners who want a softer, more relaxed backyard feel without giving up built-in functionality.
This category blends natural styling with practical features.
The I Series carries this category with its freeform design and flexible sizing options.
The I Series
As the most spacious freeform fiberglass pool design in its class, the I Series offers an open interior that feels comfortable and easy to move around in. You get a built-in tanning ledge, deep-end bench seating and optional integrated spa configurations available across select models in the series.
The curved layout gives it a softer, more relaxed look compared to a traditional rectangle. Multiple entry points, including access from the deep end, add flexibility without complicating the design. It feels natural, but still highly functional.
Pros
-
Multiple size options
- Freeform pool with tanning ledge
- Integrated spa options
Cons
-
Not automatic cover friendly
- Integrated spa option can raise your cost
#2 Rectangular Pools with Open Swim Space and Bench
For homeowners who prioritize swim space first, this layout keeps things simple and functional.
It focuses on open interior space while maintaining practical built-in seating.
The R Series defines this layout with its straightforward, open swim-focused design.
The R Series
The R Series earns its spot because of how straightforward the layout is. It centers around open, uninterrupted swim space, giving homeowners a clear lane that works just as well for laps as it does for everyday use.
Bench seating at both the shallow and deep ends adds function without crowding the interior. The rectangular shape keeps the design clean and predictable, and with six size options available, it adapts easily to different backyard footprints.
Because it’s automatic cover compatible, it also fits seamlessly into modern backyard plans where safety, efficiency, and long-term practicality matter.
Pros
-
Six size options
- Automatic cover friendly
- Open swim space with generous bench seating
Cons
-
No integrated tanning ledge
- More structured look compared to a freeform design
Each of these pool designs brings something different to the table. Still, one design family sees more installations than any other in our lineup.
Here’s the one that takes the top spot for 2026.
#1 Rectangular Pools with Wide Tanning Ledge
This combination of structure and dedicated lounge space makes the layout especially practical.
Homeowners looking for a rectangular pool that includes defined relaxation space, without sacrificing functionality are gravitating toward this layout.
The D Series anchors this category with its wide tanning ledge and balanced rectangular footprint.
The D Series
The D Series leads installations heading into 2026, with the 16x36 ranking as the most popular size, followed by the 16x40, 16x32, and 15x28.
What sets this series apart is the built-in tanning ledge that’s large enough to accommodate multiple lounge chairs.
It also features deep-end bench seating and an open interior layout that keeps the pool feeling spacious. Like the R Series, it’s automatic cover friendly, but the added ledge makes it especially appealing for homeowners who want a defined lounging zone built into the original design.
Pros
- Wide built-in tanning ledge
- Multiple size options
- Automatic Cover Friendly
Cons
- Less open swim space than a rectangle without a ledge
- Not ideal if you prefer a freeform look
Once you’ve narrowed down the right fiberglass pool model, the next question is simple: what do you want it to look like?
Let’s take a look at the pool colors homeowners are choosing most right now.
What are the Most Popular Fiberglass Pool Colors for 2026?
When it comes to our fiberglass pool designs, two colors currently lead installations heading into 2026:
- Caribbean Sparkle
- Diamond
The other pool colors we offer are California, Maya, Arctic Shimmer, and Sandstone, each with its own distinct look and water tone.
|
Caribbean Sparkle |
Diamond |
California |
|
Maya |
Arctic Shimmer |
Sandstone |
Why These Colors Are Trending
Caribbean Sparkle and Diamond are gaining traction because they pair well with a wide variety of decking materials, landscaping styles, and home exteriors. Their balanced tones complement both modern and traditional backyard designs, which makes them a comfortable choice for many homeowners.
Check out the images below to see how these two popular finishes look when installed in our pool models.
That said, color selection is personal. Some buyers prefer deeper water tones, while others lean toward lighter or warmer finishes. The right choice ultimately depends on the look you want to create and how your pool integrates with the rest of your outdoor space.
With multiple sizes and features to choose from, pricing can vary. Want a clearer idea of what your pool might cost? Try our Design and Price tool below. 
Which Fiberglass Pool Design Is Right for You?
Here’s the honest answer: there isn’t one “best” fiberglass pool design, only the one that fits your backyard and lifestyle.
The right choice depends on a few key factors:
- The size and layout of your yard.
- Local setback requirements and access.
- How you plan to use the pool (relaxing, entertaining, exercise).
- Whether features like a tanning ledge or spa matter to you.
- Your long-term maintenance goals.
Once you’ve narrowed down a few designs that align with your priorities, the next step is simple: look at exact dimensions and picture them in your space.
Reviewing specs with an independently owned and operated installer can help you see what realistically fits, and what doesn’t. That’s when the right choice usually becomes clear.
Frequently Asked Questions
What is the most popular fiberglass pool design in 2026?
In our fiberglass pool design line, the D Series ranks #1 in total installations across our independent dealer network, followed by the R Series.
What are the best fiberglass pool designs for first-time buyers?
For first-time pool buyers, the D Series and R Series are often the best fiberglass pool designs to start with. They provide versatile layouts that work for families, entertaining, and everyday swimming without requiring complex customization.
Which fiberglass pool design includes a built-in spa?
In our fiberglass pool design line, the X36 includes an integrated spa as part of its original layout and ranks among our most installed designs with that feature. We also offer the I25S and I30S in our I Series line, which combine the freeform design with a built-in spa configuration.
How do I choose the right fiberglass pool design?
To choose the right fiberglass pool design, consider your yard size, budget, how you plan to use the pool, and whether features like a spa or tanning ledge matter to you. Starting with the most popular fiberglass pool models is often a smart way to narrow your options.
Are rectangular fiberglass pool designs more popular?
Rectangular fiberglass pool designs like those in the D Series and R Series tend to be the most popular because they maximize swim space and fit well in a wide range of backyard layouts.
From the Author
When homeowners start researching fiberglass pool designs, so many options are listed and it is easy to question, “Which one is actually the best?" That’s exactly why this article exists.
Rather than listing every option in our lineup, we looked at real installation data across our independently owned and operated dealer network to see which models homeowners are choosing most heading into 2026.
I’m Cristian Shirilla, Director of Marketing at River Pools and co-owner of a fiberglass pool installation company in Virginia. My goal here was to give you a clear starting point by highlighting the fiberglass pool designs that our independent dealer network installs most often, helping you focus on designs that perform well in real backyards.
From the Manufacturer
At River Pools, we’ve seen certain fiberglass pool designs consistently rise to the top. The rankings in this article reflect real installation data from accross a network of independent installation companies, specific to our fiberglass pool design line.
Every backyard is different, which is why the most installed design isn’t automatically the right one for you. The best next step is to connect with a trusted independent installer who can evaluate your space, review dimensions, and help you determine which design aligns with your goals.
If you’re ready to explore your options, start the conversation with an experienced installer near you.
Ready to get started?
