Ireliavs Katarina
Irelia vs Katarina is a decisive matchup in LoL patch 26.19. Irelia wins with a 65.4% win rate (+30.8%) over Katarina based on 26 games. Irelia holds the advantage in both the early and late game. Below you'll find the best Irelia build, runes, laning stats, and strategies for the Irelia vs Katarina matchup.
Irelia Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Irelia 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 Irelia vs Katarina?
Irelia wins 59.2% of these games. With this many games the true rate is most likely between 47.5% and 69.8% (95% range).
- Expected
- 49.1% From both champions' overall Mid win rates
- Matchup effect
- +10.1 pts Observed minus expected
- Sample
- 71 games Lane: Mid
- vs patch 26.18
- +12.1 pts Within normal patch-to-patch noise
Lane: Mid · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.19 · Sep 24 – Sep 28
They also met in another lane (Top): 5 games, Irelia won 40.0%.
Key takeaways
- Current data slightly favors Irelia, but the sample is too limited for a strong conclusion: Irelia wins 59.2% of 71 games (95% range 47.5–69.8%).
- Both champions' overall Mid win rates predict 49.1% for Irelia; the result is within the margin of error of that, so this matchup mostly reflects the two champions' general strength.
- Irelia usually wins the lane: 1,052 gold ahead of Katarina at 15 minutes on average (69 games with a 15-minute snapshot).
- Irelia players pick Triumph much less often against Katarina: 88.3% of their other Mid games, 80.3% 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 Irelia and Katarina 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 Irelia'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.
Irelia vs Katarina Laning Stats
At 15 minutes
Whole-game averages
Irelia vs Katarina Win Rate by Game Length
Irelia's win rate against Katarina 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: Irelia's results against Katarina in short and long games are within the margin of error of each other.
Irelia vs Katarina 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)IreliaIrelia gold at 15: +1,052
- First itemEvenIrelia: 10.3 min · Katarina: 10.5 min
- Games under 20 minInsufficient data
- 20–30 min gamesInsufficient data
- 30+ min gamesInsufficient data
What Irelia Changes Against Katarina
Choices Irelia players make noticeably more or less often in this matchup than in their other Mid games.
TriumphRuneUsually88.3%vs Katarina80.3%−8.0 pts61.4% WR here
Spellslinger's ShoesBootsUsually2.0%vs Katarina5.6%+3.7 pts
Grisly MementosRuneUsually2.0%vs Katarina5.6%+3.6 pts
Health Scaling (flex)Stat shardUsually0.7%vs Katarina4.2%+3.5 pts
Best Irelia Build vs Katarina
Usual Irelia build (Mid)
76.9% win rate · 26 games
Against Katarina
Not enough matchup-specific build data: only 13 of 56 Irelia games against Katarina carried a complete build, which is too few to recommend an item path from. Use Irelia's standard build instead.
- Irelia usually completes Blade of The Ruined King first, at 10.3 min (median of 63 games).
- Katarina usually completes Lich Bane first, at 10.5 min (median of 23 games).
- Skill priority: Q > W > E — 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 Irelia Runes vs Katarina
Usual Irelia runes (Mid)
Conqueror
53.6% win rate · 358 games
Against Katarina
Conqueror
57.1% win rate · 21 games
Plan your Irelia 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
Irelia matchup data for League of Legends patch 26.19. The table below shows Irelia'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 Irelia build, runes, laning stats, and early vs late game analysis for that specific matchup.
Other Irelia Matchups
Hardest for Irelia
Easiest for Irelia
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.
Irelia vs Katarina FAQ - Patch 26.19
Who wins Irelia vs Katarina?
Current data slightly favors Irelia, but the sample is too limited for a strong conclusion: Irelia wins 59.2% of 71 games (95% range 47.5–69.8%).
What is Irelia's win rate against Katarina?
Irelia wins 59.2% of 71 Mid games against Katarina on patch 26.19 (95% range 47.5–69.8%). Based on both champions' overall Mid win rates, 49.1% would be expected.
Does Irelia counter Katarina?
Not clearly. Irelia wins 59.2% of 71 games against Katarina, and the 95% range (47.5–69.8%) includes 50%, so neither champion reliably counters the other on current data.
Who wins lane, Irelia or Katarina?
Irelia usually wins the lane: 1,052 gold ahead of Katarina at 15 minutes on average (69 games with a 15-minute snapshot).
Does Irelia outscale Katarina?
There are too few games of each length to tell yet.
When is Katarina strongest against Irelia?
On current data there is no stage of the game where Katarina is ahead of Irelia beyond the margin of error.
What should Irelia build against Katarina?
There are not enough games for a matchup-specific core, so use Irelia's usual Mid core: Kraken Slayer, Death's Dance, Maw of Malmortius. The biggest change against Katarina: Spellslinger's Shoes (2.0% usually, 5.6% here).
What runes should Irelia use against Katarina?
Conqueror with Precision and Resolve — 57.1% over 21 games against Katarina. The biggest change against Katarina: Triumph (88.3% usually, 80.3% here).