- DEFCON 5: Lowest state of readiness - this is the normal state of readiness in peacetime. Code name: FADE OUT
- DEFCON 4: Increased intelligence watch and strengthened security measures. Code Name: DOUBLE TAKEnote
- DEFCON 3: Increase in force readiness above that required for normal readiness. Air Force ready to mobilize in 15 minutes - this is the first truly "shit is about to get real" phase of the levels. Code Name: ROUND HOUSE
- DEFCON 2: War is imminent. Armed Forces ready to deploy and engage in less than 6 hours - this is the highest level ever reached in historynote . Code Name: FAST PACE
- DEFCON 1: Nuclear war is imminent. Code Name: COCKED PISTOL
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Anime and Manga
- In Macross Plus, when the Big Bad activates Earth's defense grid, astonished operators gasp "The system's at Defcon Five!", while armed satellites reorient themselves.
- The episode titles in 801 T.T.S. Airbats start with DEFCON I, counting up to DEFCON V… and beyond, with the final episode named DEFCON VI.
- One Justice League of America issue had a rather glaring example; after seeing a city attacked by some kind of aliens and he himself was set aflame, resident angel Zariel responded by shrieking "We are now at Defcon Five!" Lord knows what needs to happen in The DCU for Defcon 1… A few issues later, a Reality Warper turning the cars into goblins and a bank into a giant living monster was referred to as Defcon Four.
- One issue of The Avengers has Iron Man announcing a situation is at Defcon 1000, due to the sudden appearance of Thanos. Even more egregious given Iron Man used to be U.S. Secretary of Defense, not to mention the Director of S.H.I.E.L.D.
Films — Animated
- Played for Laughs in Beavis and Butt-Head Do America. When Cornholio talks into the red phone, the person in charge of the Defense Control Center becomes concerned and goes to Defcon 4 (from 5). However, this incorrectly sets off the Red Alert klaxon and everyone scrambles around as if this meant war was imminent.
- Ultimate Avengers: The Defcon is raised to 4 when aliens are spotted, and then "raised" again to 5 once the aliens actually begin to attack military installations.
Films — Live-Action
- How to Lose a Guy in 10 Days: "I have to crack this guy. I mean, this is Defcon Five, and I have to do something truly appalling. It's not funny." Which possibly makes sense in this context, since Ben is doing everything he can to keep the relationship peaceful while Andie is trying to get dumped.
- Undercover Brother: "That's Right! It's goin' to the streets. Hey y'all! It's revolution up in this Bitch! Set the alarm for Defcon 5! It's on, baby... it's on!"
- In Canadian Bacon, Defcon 4 means "imminent nuclear attack."
- The horrible 1980's cold war film Defcon 4 incorrectly gave Defcon 4 as the highest state of alert. The fact that they couldn't even be wrong in the usual manner was not the worst thing about this movie.
- The 2007 Transformers film handled this in an interesting fashion. The Secretary of Defense announces the country was now at "Defcon Delta, our highest alert level." The oddness is reconciled given the depth of cooperation he received from the United States armed forces: in the real world, Threat Conditions Alpha through Delta are used in the military to denote the likelihood of a terrorist/surprise attack (as opposed to a general state of hostilities and war), with 'Alpha' meaning 'remotely possible' and Delta meaning 'attack imminent or has just taken place'. Most likely, it was kept as "Defcon" in the film because that's what people would recognize.
- In Independence Day, the president says, "We may need to upgrade to Defcon 3", which could either be correct or incorrect. Either way, no one could accuse them of screwing up.
- In Cryptonomicon, the narrator refers to "some very high Defcon level, the one just short of all-out nuclear exchange." Its vagueness prevents it from falling down either way.
- Top Gear got it wrong too, where Clarkson stepping up his Bugatti Veyron (the world's fastest-ever production car) to no-spoiler fast mode took him from Defcon 3 to 4. Clarkson has also announced that it's time to go to 'Defcon Stig' once.
- Upheld in the Angel episode "Dad". Lilah refers to Wolfram and Hart as being at "Defcon, like, a thousand" over Connor's birth, Lilah being a civilian lawyer who apparently knows nothing about the military. What she was trying to say was that they were at DEFCON 1.
- Done in an episode of The Adventures of Pete & Pete with Little Pete's "LOVECON" alerts, with 5 being the highest level of "danger" (i.e., lovesickness).
- Parodied in Chuck: "We're at Defcon 1, or 5, or whichever means HURRY!"
- In one episode of The Office (US), Michael Scott declares DEFCON 10 because he is afraid of an upcoming meeting with Jan. Later in the episode, he "increases" it to DEFCON 20.
- In Mad Men (season 6 episode 1), Peggy knows the correct usage but she is annoyed by Burt Peterson who gets it wrong twice. First he uses DEFCON 4 as a synonym for a crisis and then when told he has it backwards he says they are at DEFCON 0.
- Lampshaded by 30 Rock:
Liz: Listen up, jagweeds, it's go time. We are at Defcon Five here!
Toofer: The lowest level of defense preparedness? Fantastic.
- Chicago Fire manages to avert this in the aptly named episode "Defcon One." The episode focus on the serial arsonist upping his campaign against Firehouse 51. In a sub plot line, a rival bar starts to actively sabotage Herrman's bar. When he mentions they just went to DEFCON 5, Otis quietly mentions that is in fact the lowest level.
- By Any Means 1x06: Charlie is trying to persuade Jessica to take things easy, telling her "It's like that whole DEFCON thing. You have DEFCON 1 then DEFCON 2 - you don't just start at DEFCON 5, do you?" She corrects him: "Yeah, actually you do - you start at DEFCON 5, work your way up to 1!"
- In the Tremors episode "Night of the Shriekers", Burt Gummer is ironically scolded for inappropriately going to Defcon Five over the presence of Shriekers by someone who is treating the Shriekers as no threat.
- In Community episode "Basic Intergluteal Numismatics":
Dean Pelton: From this moment, people, we are at DEFCON 4, if that's the highest DEFCON, and if high DEFCONs are worse than low ones.
- In the The Big Bang Theory episode "The Lizard-Spock Expansion", Leonard describes Howard's situation with the Mars rover as "Defcon 5". Sheldon corrects him, using the page quote, and the conversation gets derailed into a discussion of the merits of the Star Trek films.
- In The West Wing before President Bartlet delivers the State of the Union, he runs over what to do in a nightmare scenario with his designated survivor, the Secretary of Agriculture. Namely, he should get the military together, make the proper command assignments, and take the US to Defcon 4. The entire government could explode, but what's left would be pretty relaxed, all things considered.
- Platinum Blonde's 1983 hit "Standing in the Dark" contains the line "Defcon 5 / We're ready to explode.".
- Nox Arcana's Zombie Influx album contains the track "Defcon Six." I guess you could say the humans are all at peace with each other...
- Power Metal band Vicious Rumors has a line in the song Warball -
Situation Def Con FiveNo one gets out of here alive
- Done correctly in the track Defcon Zero by ParagonX9 of Newgrounds.
- The Cheap Trick song Man-U-Lip-U-Lator includes the line "full alert, DEFCON 4." Even if the scale were 1 to 5 instead of 5 to 1, DEFCON 4 still wouldn't be full alert.
- During ABC's pre-debate coverage of the third Democratic presidential primary debate in 2015, one of the people on TV mentioned Hillary Clinton's campaign going to DEFCON 7 over the data breach from the Bernie Sanders campaign.
- Played with in the radio adaptation of Good Omens. When the four Horsepersons of the Apocalypse power up the nuclear exchange that will end the world, all relevant indicators go to DEFCON 5 — because the Horsepersons have decided that having the indicators stuck on "normal peacetime conditions" while conditions become increasingly abnormal will increase the confusion.
- Ron White had a joke about his mother calling him about a change in the "Heightened State of Awareness." He came up with a simple change.
Ron: Here's my solution for the Heightened State of Awareness. 1. Go find a helmet. 2. Put on the damn helmet.
- Parodied in the flash cartoon BadGuys, where one of the characters activates an alarm and shouts "Go to Defcon 62!"
- Unskippable highlights the way that getting it wrong is bad for dramatic tension with more informed players when looking at Tom Clancy's Ghost Recon Advanced Warfighter 2.
Paul: (sarcastically) Oooh, Defcon 4. Just so you know, Defcon 4 is not that scary. The US is currently at Defcon 3.
Graham: Defcon 3 is worse, by the way.
- The Young Turks have a running gag of mocking people who invoke this trope with the Sarcasm Mode declaration, "Defcon 28 is imminent!"
- In American Dad!, Stan keeps a colour coordinated terror alert system on his fridge, which he'll adjust according to his paranoid delusions.
- X-Men: Evolution: Defcon 4 at the Xavier Institute means that the entire mansion is now in multi-layer steel-doors-all-around lockdown. Nothing gets out or in, and anything that tries to get in gets blasted by laser cannons.
- According to some accounts of the 1981 shooting of Ronald Reagan, Defense Secretary Caspar Weinberger wanted to go to DEFCON 2. He believed it meant a low state of military readiness, slightly higher than DEFCON 1, which to him meant tranquil peacetime.
- A conservative radio show host threatened to go to DEFCON 6 if California's ban on same-sex marriage was overturned, which if taken at face value meant he intended to just give up.
- American bases in the Pacific have a similar system, Tropical Cyclone Condition of Readiness, or TCCOR, designed to give personnel and their families time for last-minute preparations before a major storm hits. TCCOR 4 means winds in excess of 50 knots are expected in 72 hours or less. Each successive TCCOR state indicates a further level of preparedness you should be at (you should have all of your lawn furniture and trash cans tied down or brought inside by TCCOR 2, for example), and by TCCOR 1, all non-essential personnel should be at home, in an emergency shelter, or if they live in a low-lying area, staying some place else for the time being.