So you have a female character who lacks the characteristics and mannerisms of a normal female and only have the characteristics of a male. They can fight, then can play sports, they drink a lot, they play video games, and they're well-liked by the guys (at least some of them). Yes, that's a tomboy. But there's something missing. What could it be? Well, all she needs is a trademark baseball cap. This is the trope where a tomboy can be identified by wearing a baseball cap. Most of them wear caps if they love to play baseball, obviously. They may wear it when they're in the army. Others wear it just for the sake of setting themselves apart from the Girly Girls she's expected to hang out with. As far as this trope is concerned, you can't be a tomboy without wearing a baseball cap. When Tomboys wear caps, it's usually cool sight to see. They often wear their caps frontwards, especially if their hairstyle is a ponytail. They often wear their caps backwards just to make them look more of a badass. They even wear caps sideways if they're acting like the other black kids from the neighborhood. A subtrope of Nice Hat. See also Hat Shop.
- Allie from Digimon Legend always wears a yellow baseball cap backwards. Plus, she's an Action Girl who does have moments of being a bit pragmatic.
- Short Stuff from Daring Do can never be seen as an annoying sidekick to Daring Do without her trademark baseball cap. Despite this, she knows how to be a fierce fighter.
- The movie version of Lex Murphy from Jurassic Park is a tomboy who wears a baseball cap, although she's more of a computer nerd. In the books, however, she is a huge baseball fan and she does wear her hat proudly.
- Sam Montgomery from A Cinderella Story wears a baseball cap since she likes playing baseball. This is what makes Fiona to consider her unattractive despite being jealous of her.
- In one scene of She's the Man, Viola, a tomboy, wears a baseball cap with a British flag logo and has a huge interest in playing soccer.
- Amanda Lemmon from It Takes Two is an orphan tomboy who always wear baseball caps and loves playing street ball and hates acting lady-like for adoption.
- Annabeth Chase from Percy Jackson and the Olympians wears a Yankees baseball cap which allows her to become invisible. This goes well with her category as the Smart Action Girl.
- Dr Brown's daughter Delia in Everwood frequently wore a baseball cap and was very tomboyish. For instance, she played ice-hockey in boys' team and was very good.
- As opposed to her original portrayal as the the smart and sensible girl who enjoys dolls, celebrity gossip, and other traditional feminine activities, Alicia Guzmán of Carrusel is a tomboy who wears a baseball cap and likes playing football.
- Two of a Kind: Mary-Kate, the tomboy of the two, often wore baseball caps.
- Step by Step: Al, Frank's daughter, was the only one of the girls who was a tom-boy, and she often wore a baseball cap when she was younger on the show. She was into sports, outdoor stuff or she would help Frank with his work.
- Inverted in Peanuts, where the very girly Frieda refuses to wear a baseball cap even when she is playing baseball! She doesn't want to mess up her "naturally curly hair".
- Former WWE Diva Ashley Massaro wore a backwards black cap in her debut in 2005 (she also won the 2005 Diva Search). She stopped wearing it in around her return in 2008.
- In Disgaea 4: A Promise Unforgotten, Fuka wears a Prinny hat and happens to wield an axe in battle.
- In Borderlands 2, Gaige the Mecromancer (a Wrench Wench and self described "Woman of science and asskickery") has two heads which are caps of some sort; Keeping It Real (an actual baseball cap) and Read All About It (a paperboy style cap).
- Clementine from The Walking Dead was given a baseball cap as a gift from her dad. She also prefers playing around in her treehouse more than watching television and playing with dolls.
- White from Black Adventures wears a trademark Pokemon baseball cap. Plus she's The Lad-ette who acts like she's a part of the boys, especially her brother Black.
- Red vs. Blue: The only hat seen in the entire Red Vs. Blue universe is sported by Action Girl to the extreme Tex.
- On Family Guy when the Griffins temporarily move to the south Chris becomes "friends" with a "boy" who turns out to be a tomboy wearing a baseball cap covering her long hair.
- An aversion in Recess where Spinelli, although she is a tomboy, wears a knitted hat rather than a baseball hat.
- In one episode of The Grim Adventures of Billy & Mandy, Mandy invokes this by sporting a baseball cap as well as disguising herself as a boy named "Manfred" in her plan to prove to Billy that girls can surely play sports.
- From Arthur, there was a young female character named "W.D." who wears a baseball hat which goes along well with her boyish clothing, gender neutral haircut, and a gender neutral voice.
- Linny from Wonder Pets wears a trademark orange baseball cap and is a female, which often has the audience confused whether Linny was male, considering that caps are usually what males usually wear.
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