A jon boat does not need a huge 10-inch or 12-inch fish finder to catch more fish.
In fact, installing oversized electronics on a small aluminum boat can create more problems than it solves.
Jon boats normally have limited console space, basic electrical systems, and very little room for complicated wiring.
Many are also used in shallow rivers, ponds, creeks, and smaller lakes where a compact unit with good sonar and GPS can be more useful than expensive tournament electronics.
So I focused on fish finders that are easy to mount, reasonably compact, and currently available through Amazon.
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Quick Comparison
| Fish Finder | Best For | Screen | Main Advantage |
|---|---|---|---|
| Garmin ECHOMAP UHD2 53cv | Best Overall | 5" | Real mapping in compact size |
| Garmin STRIKER Vivid 5cv | Best Value | 5" | ClearVü + GPS |
| Lowrance Eagle 5 SplitShot HD | Best Easy Setup | 5" | CHIRP + DownScan |
| Humminbird PiranhaMAX 4 DI | Best Budget Imaging | 4.3" | Cheap Down Imaging |
| Deeper PRO+ 2 | Best No-Drill Option | Phone | No permanent installation |
Best Fish Finders for Jon Boats
Jon boats are usually simple boats, and I think the electronics should stay fairly simple too.
Before buying, consider:
- Available mounting space
- Battery size
- Transducer mounting location
- Whether you need maps
- Whether the boat is shared or rented
- How often you fish shallow water
If your boat is larger than a normal jon boat, our Best Fish Finder for Small Boats may give you more options.
1. Best Overall: Garmin ECHOMAP UHD2 53cv
The ECHOMAP UHD2 53cv is a strong fit for a jon boat because you get real chartplotter functionality without needing a big screen.
Its 5-inch display fits easily on a small console, bench mount, or accessory bracket.
The included GT20-TM transducer provides traditional CHIRP and ClearVü scanning sonar.
Where it really separates itself from cheaper units is mapping.
You get Garmin Navionics+ U.S. Inland maps, GPS, and Quickdraw Contours, which is useful when running unfamiliar rivers or smaller lakes.
Amazon was listing the exact 53cv inland bundle with the GT20-TM transducer at $449.99 in early August 2026.
Special features:
- 5-inch display
- Garmin Navionics+ maps
- Traditional CHIRP
- ClearVü
- Built-in GPS
- Quickdraw Contours
- Compact design
2. Best Value: Garmin STRIKER Vivid 5cv
The STRIKER Vivid 5cv is probably the better choice if you do not need preloaded lake maps.
You still get a full 5-inch display, traditional CHIRP, ClearVü, GPS, and Quickdraw Contours.
That is more than enough for most jon boat fishing.
You can mark submerged trees, creek channels, holes, ramps, and productive fishing spots and return to them later.
It is also noticeably cheaper than moving into a full ECHOMAP system.
Current 2026 Amazon-focused buying guides continue to list the STRIKER Vivid 5cv as one of the strongest small-boat and jon-boat options.
Special features:
- 5-inch screen
- Traditional CHIRP
- ClearVü
- GPS
- Quickdraw Contours
- Simple button controls
3. Best Easy Setup: Lowrance Eagle 5 SplitShot HD
The Eagle 5 SplitShot HD works well if you want a fish finder that handles most sonar adjustment automatically.
Its SplitShot HD transducer combines CHIRP sonar with DownScan Imaging.
You also get FishReveal, which helps display fish more clearly against underwater structure.
Lowrance's autotuning sonar reduces the amount of manual adjustment you need to make as water depth and conditions change.
The 5-inch IPS display is also a practical size for a jon boat.
The current Eagle 5 SplitShot HD package with inland charts and transducer is listed through Amazon.
Special features:
- 5-inch IPS display
- CHIRP sonar
- DownScan Imaging
- FishReveal
- Autotuning sonar
- Compact mounting size
4. Best Budget Imaging: Humminbird PiranhaMAX 4 DI
If your jon boat is basic and you just want to see what is underneath you, there is no reason to spend $500.
The PiranhaMAX 4 DI gives you a 4.3-inch display with Down Imaging and Dual Beam sonar.
That makes it useful when fishing around submerged timber, weed beds, rocks, bridge pilings, or other structure.
There is no GPS or mapping.
But that also keeps the unit very simple and affordable.
Current Amazon-focused listings show the PiranhaMAX 4 DI around the budget end of Humminbird's range, and recent 2026 guides still list it as Prime/Amazon available.
Special features:
- 4.3-inch display
- Down Imaging
- Dual Beam sonar
- Fish ID+
- Compact transom transducer
- Low price
5. Best No-Drill Fish Finder: Deeper PRO+ 2
Some jon boat owners do not want to drill holes into the transom or permanently run wires through the boat.
This is especially true if you use a rental jon boat or regularly move between several boats.
The Deeper PRO+ 2 removes almost all of that installation.
You can troll or position the sonar beside the boat and use your phone as the display.
It also has GPS and can create bathymetric maps.
Amazon had the PRO+ 2 in stock at around $199.99 in August 2026, making it one of the easier portable alternatives to a permanently mounted fish finder.
Special features:
- No permanent installation
- Built-in GPS
- Three sonar beams
- Bathymetric mapping
- Smartphone display
- Easy to move between boats
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Conclusion
A jon boat benefits more from compact, useful electronics than from a huge display taking up half the boat.
The Garmin ECHOMAP UHD2 53cv is the best overall choice if you want proper mapping.
If you mainly need sonar and GPS, the STRIKER Vivid 5cv gives you almost everything most jon boat anglers actually use for much less money.
