21.5 in 4K UHD Gaming Monitor

8 offers, priced from $39.99 to $2,999.99: this page gathers current listings for 21.5 in 4K UHD Gaming Monitor. Compare features and ratings side by side instead of combing through dozens of marketplace pages one at a time.

$300.00Median price
$39.99 – $2,999.99Price range
8Offers with price
Full price analysis →
Price trend

The median price is currently $119.99 — about 20% higher than 30 days ago.

Range in this period: $100.05 – $119.99 · As of September 15, 2026
Common specs:16:9 (5×)3840 x 2160 (4×)21.5 (3×)
Selection criteria:Screen SizeDisplay ResolutionAdaptive SyncConnectivityDisplay Type

Best 21.5 in 4K UHD Gaming Monitor 2026

Our top picks: 21.5 in 4K UHD Gaming Monitor

Selected automatically from marketplace relevance and prices of 8 listed offers.

  1. BenQ MOBIUZ EX271U 27" 4K HDR 165Hz Gaming Monitor 16:9, HDR10, FreeSync Premium
    Top matchBenQ MOBIUZ EX271U 27" 4K HDR 165Hz Gaming Monitor 16:9, HDR10, FreeSync Premium
    27 in165 Hz3840 x 2160

    The BenQ MOBIUZ EX271U is a 27-inch 4K HDR gaming monitor with a 165Hz refresh rate, 1ms response time, and FreeSync Premium.

    $300.00Find on Amazon →See on eBay →
  2. 4K Tragbarer Monitor, 15.6" Portable Display 3840 x 2160 IPS UHD 1500:1 HDR Used
    Budget pick4K Tragbarer Monitor, 15.6" Portable Display 3840 x 2160 IPS UHD 1500:1 HDR Used
    16:9600 cd/m²1500:1

    This UPERFECT 4K portable monitor features a 15.6-inch IPS LED display with 3840x2160 UHD resolution, 600 cd/m² brightness, and a 1500:1 contrast ratio.

    $75.99Find on Amazon →See on eBay →
  3. Brand New Samsung Gaming Monitor With 120 FPS And 4k Graphics
    Premium pickBrand New Samsung Gaming Monitor With 120 FPS And 4k Graphics
    26 in250 cd/m²144 Hz

    This Samsung gaming monitor features a 26-inch curved screen with 1080p resolution, 144Hz refresh rate, and 4ms response time.

    $370.00Find on Amazon →See on eBay →

Top 5: 21.5 in 4K UHD Gaming Monitor compared

#ProductPriceRatingScreen SizeRefresh RateStrength
1BenQ MOBIUZ EX271U 27" 4K HDR 165Hz Gaming Monitor 16:9, HDR10, FreeSync PremiumBenQ MOBIUZ EX271U 27" 4K HDR 165Hz Gaming Monitor 16:9, HDR10, FreeSync Premium$300.00—27 in165 Hz4K resolution with 165Hz refresh rate
2LG UltraGear 31.5" Dual Mode UHD 4K 240Hz, FHD 480Hz OLED Gaming Monitor, HDR10LG UltraGear 31.5" Dual Mode UHD 4K 240Hz, FHD 480Hz OLED Gaming Monitor, HDR10$1,129.99—31.5 in480 Hz—
3Brand New Samsung Gaming Monitor With 120 FPS And 4k GraphicsBrand New Samsung Gaming Monitor With 120 FPS And 4k Graphics$370.00—26 in144 Hz144Hz refresh rate
44K Gaming Monitor4K Gaming Monitor$249.99—31.5 in—Large 31.5-inch curved screen
54K Tragbarer Monitor, 15.6" Portable Display 3840 x 2160 IPS UHD 1500:1 HDR Used4K Tragbarer Monitor, 15.6" Portable Display 3840 x 2160 IPS UHD 1500:1 HDR Used$75.99—15.6 in60hz4K UHD 3840x2160 resolution
See all 21.5 in 4K UHD results Search Amazon →

FAQ: 21.5 in 4K UHD Gaming Monitor

How much does 21.5 in 4K UHD Gaming Monitor cost?

Across 8 priced offers, prices range from $39.99 to $2,999.99; the median is $300.00 (as of September 2026).

How do you narrow down the right model for 21.5 in 4K UHD Gaming Monitor?

Useful comparison criteria are Screen Size, Display Resolution, Adaptive Sync, Connectivity and Display Type; this page's filters are built around them.