10 Best 40 Inch Smart Tvs 2025 in the United States

The LG 42-Inch OLED evo AI 4K C5 Series Smart TV offers an impressive viewing experience thanks to its OLED display, which delivers perfect blacks and vibrant colors by controlling each pixel individually. With a 4K resolution and support for Dolby Vision and HDR10, the picture quality is sharp and bright, making movies and shows look stunning. The TV’s 120Hz refresh rate ensures smooth motion, which is great for fast scenes in sports or gaming, although some gamers might wish for a full 144Hz. It also features low response times and advanced gaming tech like NVIDIA G-Sync and AMD FreeSync, making it a strong choice for gaming enthusiasts.

Sound is enhanced by Dolby Atmos and LG's Wow Orchestra technology, providing immersive audio without needing extra speakers. The built-in Alpha 9 AI processor boosts picture and sound quality, adapting to what you watch, which is helpful if you're not keen on manual settings. Its smart platform, webOS, is user-friendly and offers many streaming apps plus handy voice assistants like Alexa built-in. Connectivity options are solid with multiple HDMI 2.1 ports, USB, Bluetooth, and Wi-Fi, supporting various devices easily.

The design is sleek and modern, fitting well in a living room, and the 42-inch size is good for medium-sized spaces, although slightly bigger sizes might suit larger rooms better. A minor consideration is that the TV is priced towards the upper mid-range, so it might be a bit expensive for budget shoppers. This LG model is well suited for someone wanting excellent picture and sound quality, smart features, and a good gaming experience in a compact 42-inch OLED screen.

The INSIGNIA 43" Class F50 Series is a solid choice if you're looking for a smart TV around 40 inches with 4K picture quality. Its 4K Ultra HD resolution combined with HDR10 support helps deliver clear, vibrant images with good contrast, so movies and shows look sharp and colorful. The refresh rate is standard at 60 Hz, which is fine for everyday TV watching but not ideal if you want super-smooth motion for fast-paced sports or gaming.

Powered by the Fire TV platform, this TV offers easy access to popular apps like Netflix, Prime Video, and Disney+, plus a large library of free ad-supported content. The Alexa Voice Remote makes navigation simple, and it can also act as a smart home hub to control compatible devices. Connectivity is versatile, featuring 3 HDMI ports, USB, Wi-Fi, Bluetooth, and even Apple AirPlay support, covering most connection needs.

Sound quality benefits from DTS Virtual-X technology, providing a decent immersive experience without needing extra speakers, and HDMI eARC support means you can connect high-quality audio devices if you want better sound. The viewing angle is typical for LED TVs, so picture quality is best when viewed straight on. The design is straightforward with a slim profile and wall-mount compatibility, making it easy to fit in various spaces. At around 25 pounds, it’s manageable to set up.

The TCL 43-Inch Class S5 UHD 4K LED Smart TV with Fire TV (43S551F, 2024 Model) offers a lot of impressive features for its category. The 4K UltraHD resolution provides stunning detail, which is four times the resolution of 1080p Full HDTVs. It also boasts HDR PRO+ with Dolby Vision, HDR10+, HDR10, and HLG, ensuring enhanced contrast and vibrant colors, making your viewing experience more realistic and immersive. The Fire TV platform is a great addition, giving you access to a vast array of streaming services and live TV, all in one place.

Alexa built-in with voice remote makes navigation and control easy, adding to the convenience. The TV also supports Apple AirPlay 2, which is a nice touch for iOS users. For gamers, the Auto Game Mode (ALLM) minimizes input lag for smoother gameplay. On the audio side, it features Dolby Atmos and DTS Virtual:X for a more immersive sound experience, and an Enhanced Dialogue Mode for clearer audio in movies and shows. The design is sleek with a bezel-less look, making it a stylish addition to any room.

However, there are a few drawbacks. The refresh rate is only 60 Hz, which might not be ideal for those who prioritize super-smooth motion, especially in fast-paced action scenes or sports. Additionally, while the built-in speakers are decent, they might not satisfy audiophiles or those looking for a more powerful sound system. Lastly, although the viewing angles are generally good, there may be some color distortion when viewed from extreme angles. This TV is a strong contender in the 40-inch smart TV category, especially for those who enjoy streaming, gaming, and smart home integration, but may fall short for those seeking top-tier refresh rates and audio performance.