The number 16 appears frequently in the mythology of Young Justice. Its significance, if any, remains to be revealed.
- The reality designation of the Young Justice series is Earth-16, part of the DC Multiverse.
- Superboy was 16 weeks old as of his first appearance in "Independence Day", and biologically 16 years old.
- Miss Martian was 48 years old in the first season, the Martian equivalent of a human 16-year-old girl.
- Aqualad, Garth and Tula were 16 years old in season one.
- There are 16 members of the Justice League as of "Independence Day".
- Red Tornado, the caretaker of the the Team, has a Justice League designation number of 16.
- In Young Justice #0, Kid Flash and Superboy visit a clothing store called Forever Sixteen.
- "Failsafe" is the 16th episode of the show and it breaks the mold by presenting a scenario where all the Leaguers are killed and the Team must step up. It also has a twist ending and its events have lasting traumatic effects on the Team. These events take place on October 16 and there are two timestamps indicating the hour 16. Also, in the mothership, Robin says that the countdown of the explosion reached 16 seconds.
- In the episode "Coldhearted", Wally West turned 16.
- Likewise, when Wally wakes up, half of his alarm clock is covered by a piece of clothing, showing only 16 minutes.
- In "Auld Acquaintance", Red Tornado says that the Starro-tech takes 0.16 nano-seconds to be fully assimilated by its host.
- Also in that episode, there is a 16 hour period, for which the location, and activities, of six Leaguers is unaccounted for.
- Batgirl's designation number is .
- In "Darkest", Impulse claims to have taken 1.6 seconds to create his self-portrait.
- In "Players, Chapter Two: Directly to Jail", Kylstar holds his captives in Weapons Room Sixteen.
The number 16 frequently appears in timestamps on the show and comics:
- In Young Justice #0, all of the timestamps have 16 seconds on them.
- Speedy foils one of Brick's operations on July 17, 23:16 PDT.
- On the next day, the Team eagerly rushes outside Mount Justice to intercept Red Tornado at 11:16 EDT.
- Red Arrow confronts Artemis in Gotham City on August 9, 01:16 EDT.
- Miss Martian wakes up alone and amnesiac in the Bialyan desert on September 4, 00:16 EEST.
- The Terror Twins are defeated by Superman and Martian Manhunter on September 14, 16:53 CDT.
- Superboy and Miss Martian are in transport to Belle Reve Penitentiary on September 16, 21:55 CDT.
- Captain Marvel returns to Fawcett City after the mission in Northern India on September 24, 22:16 CDT.
- Green Arrow and Red Arrow fight a giant plant in Star City on October 1, 16:57 PDT.
- The Team decides to start their own investigation into Red Tornado, as the League has had no apparent results on October 10, 16:58 EDT.
- The Team gets word that many heroes have fallen to alien invaders on October 16, 16:01 EDT.
- The Team wakes up from their training simulation on October 16, 16:21 EDT.
- Aqualad and Artemis meet with Randy and Peggy Eiling to clear their father's name on August 14, 09:16 HST.
- Kent Nelson's funeral takes place on August 21, 16:07 EDT.
- Sensei and Talia al Ghul revive Ra's al Ghul in a Lazarus Pit on August 25, 23:16 ECT.
- Aqualad is ambushed by Clayface on August 27, 06:16 EDT.
- The Team helps Zatanna unpack as she moves into the Cave on November 7 at 09:16 EST.
- On November 11, Wally's wakes up at 07:16.
- Later on, Wally teleports to the Cave at 16:05 EST.
- Kid Flash arrives to Boston to collect the heart for Perdita at 16:26 EST.
- Kid Flash arrives to Chicago at 16:49 CST.
- Kid Flash arrives to South Dakota at 16:13 MST.
- Superman makes a public announcement introducing five new members of the Justice League on December 30 at 09:16 EST.
- T.O. Morrow removes the fake skin of Danette Reilly and Jim Lockhart to expose their robotic bodies on September 7 at 00:16 MDT.
- In December 31, 2010, all three timestamps indicate 16 minutes.
- Superboy and Miss Martian had just defeated Clayface in the Gotham City sewers on January 1, 2016 at 16:16 EST.
- Adam Strange and the Zeta Squad arrive at Rann on January 4 at 22:16.
- Kid Flash and Flash round up escaped zoo animals on September 7 at 16:39 CDT.
- Nightwing finishes going over his mission in Gorilla City on September 27, 2015 at 04:16 EDT.
- Dick receives birthday greetings at 16:16 EST in 2010 and at 08:16 in 2015.
- Black Manta dispatches Aqualad on a mission on March 23 at 16:03 EDT.
- After freeing themselves from Kylstar's containers, the heroes plan their next move on December 1 at 16:16 UTC.
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