Jarvan IVvs Rengar
Jarvan IV vs Rengar is a decisive matchup in LoL patch 26.19. Rengar wins with a 72.0% win rate (+44.0%) over Jarvan IV based on 25 games. Rengar holds the advantage in both the early and late game. Below you'll find the best Jarvan IV build, runes, laning stats, and strategies for the Jarvan IV vs Rengar matchup.
Jarvan IV Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Jarvan IV performs against them. You'll get head-to-head win rates, laning stats, the best build and runes for the matchup, and early vs late game analysis — all based on real ranked data.
Who wins Jarvan IV vs Rengar?
Jarvan IV wins 51.8% of these games. With this many games the true rate is most likely between 39.0% and 64.3% (95% range).
- Expected
- 53.5% From both champions' overall Jungle win rates
- Matchup effect
- −1.7 pts Observed minus expected
- Sample
- 56 games Lane: Jungle
- vs patch 26.18
- −14.3 pts Within normal patch-to-patch noise
Lane: Jungle · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.19 · Sep 24 – Sep 28
Key takeaways
- Current data slightly favors Jarvan IV, but the sample is too limited for a strong conclusion: Jarvan IV wins 51.8% of 56 games (95% range 39.0–64.3%).
- Both champions' overall Jungle win rates predict 53.5% for Jarvan IV; the result is within the margin of error of that, so this matchup mostly reflects the two champions' general strength.
- Neither side reliably wins the lane: the average gold difference at 15 minutes is 80, within the margin of error (56 games).
- Jarvan IV players pick Plated Steelcaps far more often against Rengar: 51.6% of their other Jungle games, 75.0% here.
How we calculate this
Games: ranked Solo/Duo and Flex games on the North America server from the patch shown. Remakes (games under 5 minutes) are excluded.
A game only counts when Jarvan IV and Rengar played the same position on opposite teams, so roaming, lane swaps within a team or a champion merely being in the same game never count as this matchup.
The 95% range is a Wilson score interval. Confidence comes from how wide that range is: within ±3 points is very high, ±5 high, ±8 moderate, anything wider low. Below 20 games a matchup is not classified at all.
Expected win rate combines both champions’ win rates in this lane (same games and filters) with the log5 formula: E = A(1−B) / (A(1−B) + B(1−A)). Matchup effect = observed − expected.
"What changes" compares Jarvan IV's choices in this matchup with the same champion's other games in the same lane, and lists a change only when it is at least 3 points and statistically significant (two-proportion z-test, |z| ≥ 2, 20+ games).
Results are not split by rank: the sample per rank is too small for honest per-rank matchup numbers.
Jarvan IV vs Rengar Laning Stats
At 15 minutes
Whole-game averages
Jarvan IV vs Rengar Win Rate by Game Length
Jarvan IV's win rate against Rengar by game length. The dot is the win rate, the bar its 95% range and the dashed line the champion's usual win rate at that length. Lengths with fewer than 25 games are left blank.
No game length stands out: Jarvan IV's results against Rengar in short and long games are within the margin of error of each other.
Jarvan IV vs Rengar Power Spikes
Who is ahead at each stage, measured from these games. A stage reads "Even" when the difference is inside the margin of error, and "Insufficient data" when there are too few games to tell.
- Lane (15 min)EvenJarvan IV gold at 15: −80
- First itemEvenJarvan IV: 0.2 min · Rengar: 0.1 min
- Games under 20 minInsufficient data
- 20–30 min gamesInsufficient data
- 30+ min gamesInsufficient data
What Jarvan IV Changes Against Rengar
Choices Jarvan IV players make noticeably more or less often in this matchup than in their other Jungle games.
Plated SteelcapsBootsUsually51.6%vs Rengar75.0%+23.4 pts50.0% WR here
Mercury's TreadsBootsUsually35.3%vs Rengar17.9%−17.4 pts
Death's DanceItemUsually29.3%vs Rengar42.9%+13.6 pts70.8% WR here
Mosstomper Seedling + Stealth WardStarting itemsUsually3.7%vs Rengar12.5%+8.8 pts
Health (defense)Stat shardUsually4.4%vs Rengar10.7%+6.3 pts
Treasure HunterRuneUsually1.4%vs Rengar5.4%+4.0 pts
Best Jarvan IV Build vs Rengar
Usual Jarvan IV build (Jungle)
70.3% win rate · 74 games
Against Rengar
Not enough matchup-specific build data: only 4 of 39 Jarvan IV games against Rengar carried a complete build, which is too few to recommend an item path from. Use Jarvan IV's standard build instead.
- Jarvan IV usually completes Scorchclaw Pup first, at 0.2 min (median of 32 games).
- Rengar usually completes Gustwalker Hatchling first, at 0.1 min (median of 46 games).
- Skill priority: Q > E > W — the same as usual.
Builds are ranked by the lower edge of their win rate range, not the raw win rate, so a build seen in a handful of wins never outranks a proven one.
Best Jarvan IV Runes vs Rengar
Usual Jarvan IV runes (Jungle)
Conqueror
54.3% win rate · 361 games
Against Rengar
Conqueror50.0% win rate · 22 games
Plan your Jarvan IV draft in Draft Lab
Draft Lab lays out both teams lane by lane with live matchup win rates, damage profiles and game-phase lean, and suggests picks and bans from current meta data.
- Full 5v5 draft board
- Lane matchup win rates
- Pick and ban suggestions
Jarvan IV matchup data for League of Legends patch 26.19. The table below shows Jarvan IV's win rate, gold difference, and performance stats against every champion in the current meta. Click any champion name to see a detailed head-to-head breakdown including the best Jarvan IV build, runes, laning stats, and early vs late game analysis for that specific matchup.
Other Jarvan IV Matchups
Hardest for Jarvan IV
Easiest for Jarvan IV
Win rate and games for each matchup. Lists are ranked by the edge of the 95% range so small samples cannot top them; matchups with at least 50 games only.
Help us maintain accuracy! If you notice incorrect stats, missing data, or any issues, your feedback directly improves the quality of our data for the entire community.
Jarvan IV vs Rengar FAQ - Patch 26.19
Who wins Jarvan IV vs Rengar?
Current data slightly favors Jarvan IV, but the sample is too limited for a strong conclusion: Jarvan IV wins 51.8% of 56 games (95% range 39.0–64.3%).
What is Jarvan IV's win rate against Rengar?
Jarvan IV wins 51.8% of 56 Jungle games against Rengar on patch 26.19 (95% range 39.0–64.3%). Based on both champions' overall Jungle win rates, 53.5% would be expected.
Does Jarvan IV counter Rengar?
Not clearly. Jarvan IV wins 51.8% of 56 games against Rengar, and the 95% range (39.0–64.3%) includes 50%, so neither champion reliably counters the other on current data.
Who wins lane, Jarvan IV or Rengar?
Neither side reliably wins the lane: the average gold difference at 15 minutes is 80, within the margin of error (56 games).
Does Jarvan IV outscale Rengar?
There are too few games of each length to tell yet.
When is Rengar strongest against Jarvan IV?
On current data there is no stage of the game where Rengar is ahead of Jarvan IV beyond the margin of error.
What should Jarvan IV build against Rengar?
There are not enough games for a matchup-specific core, so use Jarvan IV's usual Jungle core: Voltaic Cyclosword, Profane Hydra, Axiom Arc. The biggest change against Rengar: Plated Steelcaps (51.6% usually, 75.0% here).
What runes should Jarvan IV use against Rengar?
Conqueror with Precision and Inspiration — 50.0% over 22 games against Rengar. The biggest change against Rengar: Health (defense) (4.4% usually, 10.7% here).