Sci-fi - 70 Halloween Costume Ideas

Sci-Fi Halloween Costume Ideas in 2026

Sleek suits, tech details, costumes built for a future that never quite arrived.
Action Superhero Fantasy
Duncan Idaho From Dune
Dune

Duncan Idaho From Dune

 Lady Jessica From Dune
Dune

Lady Jessica From Dune

 Jobu Tupaki Costume & Cosplay Guide 2026
Everything Everywhere All at Once

Jobu Tupaki Costume & Cosplay Guide 2026

 Evelyn Wang Costume from Everything Everywhere – 2026
Everything Everywhere All at Once

Evelyn Wang Costume from Everything Everywhere – 2026

 The Fourth Doctor from Doctor Who
Doctor Who

The Fourth Doctor from Doctor Who

 Kara Thrace Costume Guide
Female

Kara Thrace Costume Guide

 Jungle Hunter Predator From Predator 1987
Predator 1987

Jungle Hunter Predator From Predator 1987

 Taabe Costume from Prey – Halloween 2026 Guide
Prey

Taabe Costume from Prey – Halloween 2026 Guide

 Naru Costume from Prey – Halloween 2026 Guide
Prey

Naru Costume from Prey – Halloween 2026 Guide

 Predator Costume from Prey – Halloween 2026 Guide
Dane DiLiegro

Predator Costume from Prey – Halloween 2026 Guide

 Cassian Andor Costume from Star Wars Andor – 2026 Guide
Diego Luna

Cassian Andor Costume from Star Wars Andor – 2026 Guide

 Nebula From MCU
Thor - Love and Thunder

Nebula From MCU

 Caleb Nichols Costume from Westworld – Halloween 2026
Westworld

Caleb Nichols Costume from Westworld – Halloween 2026

 Charlotte Hale Costume from Westworld Season 4
Female

Charlotte Hale Costume from Westworld Season 4

 Teddy Flood Costume from Westworld – Halloween 2026
James Marsden

Teddy Flood Costume from Westworld – Halloween 2026

 Bernard Lowe Costume from Westworld – Halloween 2026
Jeffrey Wright

Bernard Lowe Costume from Westworld – Halloween 2026

 Man in Black Costume from Westworld – Halloween 2026
Male

Man in Black Costume from Westworld – Halloween 2026

 Maeve Millay Costume from Westworld – Halloween 2026
Westworld

Maeve Millay Costume from Westworld – Halloween 2026

 Dolores Abernathy Costume from Westworld – Halloween 2026
Evan Rachel Wood

Dolores Abernathy Costume from Westworld – Halloween 2026

 Will Byers Costume from Stranger Things – Halloween 2026
Male

Will Byers Costume from Stranger Things – Halloween 2026
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About Sci-fi Costumes

Sci-fi costumes lean on clean lines and tech details over anything textured or worn-in, Sombra's tactical tech, the Men in Black suits, Ellen Ripley's utilitarian gear. Sharp and functional beats messy every time in this genre.

A few well-placed tech accents, a visor, gloves, a chest piece, do more than an entire costume covered in gadgets. Pick one or two details and make them count.

Sci-fi Costumes: FAQ

Some do, most don't. Check the specific character, plenty read fine without any electronics involved.

It covers all of them, film, TV, and games with a sci-fi setting.

A plain black or tactical-style outfit plus one tech accessory, like the Men in Black suits.

Related Tags

Action superhero fantasy