- Win Rate
- 48.4%
- Pick Rate
- 3.2%
- Ban Rate
- 9.0%
Irelia vs Kassadin
- Patch
- 26.19
- Games
- 2,918
- Lane
- All Lanes
- Tier
- All Tiers
- Last Updated
- Oct 5, 2026 UTC
- Methodology
- Data Methodology
- Author
- Dakota Chinnick
Irelia vs Kassadin is a decisive matchup in LoL patch 26.19. Kassadin wins with a 90.9% win rate (+81.8%) over Irelia based on 11 games. Kassadin 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 Kassadin 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 Kassadin?
Irelia wins 37.5% of these games. With this many games the true rate is most likely between 22.9% and 54.7% (95% range).
- Expected
- 47.7% From both champions' overall Mid win rates
- Matchup effect
- −10.2 pts Observed minus expected
- Sample
- 32 games Lane: Mid
- vs patch 26.18
- — Not enough games on both patches
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): 3 games, Irelia won 0.0%.
Key takeaways
- Current data slightly favors Kassadin, but the sample is too limited for a strong conclusion: Irelia wins 37.5% of 32 games (95% range 22.9–54.7%).
- Both champions' overall Mid win rates predict 47.7% 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: 1,289 gold ahead of Kassadin at 15 minutes on average (32 games with a 15-minute snapshot).
- Irelia players pick Hullbreaker far more often against Kassadin: 25.1% of their other Mid games, 50.0% 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 Irelia and Kassadin 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 Kassadin Laning Stats
At 15 minutes
Whole-game averages
Irelia vs Kassadin Win Rate by Game Length
Irelia's win rate against Kassadin 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 Kassadin in short and long games are within the margin of error of each other.
Irelia vs Kassadin 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: +1,289
- First itemIreliaIrelia: 9.9 min · Kassadin: 11.1 min
- Games under 20 minInsufficient data
- 20–30 min gamesInsufficient data
- 30+ min gamesInsufficient data
What Irelia Changes Against Kassadin
Choices Irelia players make noticeably more or less often in this matchup than in their other Mid games.
HullbreakerItemUsually25.1%vs Kassadin50.0%+24.9 pts
Doran's Blade + Health Potion + Stealth WardStarting itemsUsually22.6%vs Kassadin40.6%+18.1 pts
Wit's EndItemUsually38.7%vs Kassadin56.3%+17.6 pts
Immortal PathBootsUsually9.3%vs Kassadin21.9%+12.6 pts
DemolishRuneUsually10.0%vs Kassadin21.9%+11.8 pts
Doran's Bow + Health Potion + Health PotionStarting itemsUsually8.5%vs Kassadin18.8%+10.3 pts
Best Irelia Build vs Kassadin
Usual Irelia build (Mid)
76.9% win rate · 26 games
Against Kassadin
Not enough matchup-specific build data: only 5 of 25 Irelia games against Kassadin 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 9.9 min (median of 30 games).
- Kassadin usually completes Rod of Ages first, at 11.1 min (median of 21 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 Kassadin
Usual Irelia runes (Mid)
Conqueror
53.6% win rate · 358 games
Against Kassadin
Too few games for a matchup-specific rune page yet — use the usual page.
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 Kassadin FAQ - Patch 26.19
Who wins Irelia vs Kassadin?
Current data slightly favors Kassadin, but the sample is too limited for a strong conclusion: Irelia wins 37.5% of 32 games (95% range 22.9–54.7%).
What is Irelia's win rate against Kassadin?
Irelia wins 37.5% of 32 Mid games against Kassadin on patch 26.19 (95% range 22.9–54.7%). Based on both champions' overall Mid win rates, 47.7% would be expected.
Does Irelia counter Kassadin?
Not clearly. Irelia wins 37.5% of 32 games against Kassadin, and the 95% range (22.9–54.7%) includes 50%, so neither champion reliably counters the other on current data.
Who wins lane, Irelia or Kassadin?
Irelia usually wins the lane: 1,289 gold ahead of Kassadin at 15 minutes on average (32 games with a 15-minute snapshot).
Does Irelia outscale Kassadin?
There are too few games of each length to tell yet.
When is Kassadin strongest against Irelia?
On current data there is no stage of the game where Kassadin is ahead of Irelia beyond the margin of error.
What should Irelia build against Kassadin?
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 Kassadin: Hullbreaker (25.1% usually, 50.0% here).
What runes should Irelia use against Kassadin?
Use Irelia's usual Conqueror page (Precision + Inspiration); there are too few games for a matchup-specific page. The biggest change against Kassadin: Demolish (10.0% usually, 21.9% here).