Karthus LoL Stats, Builds, Counters and Synergies

RiftMind tracks Karthus champion stats by role, including win rate, pick rate, builds, counters, matchups, and synergies for League of Legends draft analysis.

Updated 2026-09-20. Data is current for LoL patch 26.18 (all regions, low elo and high elo).

How RiftMind calculates these stats

RiftMind calculates these statistics from Ranked Solo/Duo match records filtered by patch, region, rank scope, champion, and role.

Champion role, build, rune, and item summaries use patch-specific aggregates, while counter and synergy pages compare observed results with role-adjusted expectations over a rolling patch window.

Read the full methodology for the data filters and interpretation guidance.

Karthus role performance snapshot

  1. Karthus Jungle stats - Karthus Jungle has 48.4% win rate, 1.3% pick rate, and 5,003 ranked games in the current RiftMind data set. Win rate changed -0.8 percentage points from the comparison patch. Pick rate changed +0.0 percentage points from the comparison patch.
  2. Karthus ADC stats - Karthus ADC has 53.4% win rate, 0.3% pick rate, and 1,134 ranked games in the current RiftMind data set. Win rate changed -0.2 percentage points from the comparison patch. Pick rate changed +0.0 percentage points from the comparison patch.
  3. Karthus Mid stats - Karthus Mid has 46.5% win rate, 0.2% pick rate, and 579 ranked games in the current RiftMind data set. Win rate changed -3.5 percentage points from the comparison patch. Pick rate changed +0.0 percentage points from the comparison patch.

Top 5 Low Elo Karthus counter matchups

  1. Senna Support - Low Elo data: Karthus Jungle vs Senna Support, 41.6% observed win rate, -6.7 percentage points vs expected, 560 games, 3-patch window 26.16-26.18.
  2. Kayn Jungle - Low Elo data: Karthus Jungle vs Kayn Jungle, 45.5% observed win rate, -3.0 percentage points vs expected, 987 games, 3-patch window 26.16-26.18.
  3. Ezreal ADC - Low Elo data: Karthus Jungle vs Ezreal ADC, 49.9% observed win rate, -2.7 percentage points vs expected, 1,112 games, 3-patch window 26.16-26.18.
  4. Master Yi Jungle - Low Elo data: Karthus Jungle vs Master Yi Jungle, 47.1% observed win rate, -2.4 percentage points vs expected, 811 games, 3-patch window 26.16-26.18.
  5. Yone Mid - Low Elo data: Karthus Jungle vs Yone Mid, 46.6% observed win rate, -2.0 percentage points vs expected, 832 games, 3-patch window 26.16-26.18.

Top 5 Low Elo champions Karthus is good against

  1. Briar Jungle - Low Elo data: Karthus Jungle vs Briar Jungle, 54.1% observed win rate, +7.7 percentage points vs expected, 639 games, 3-patch window 26.16-26.18.
  2. Ashe ADC - Low Elo data: Karthus Jungle vs Ashe ADC, 54.2% observed win rate, +4.9 percentage points vs expected, 890 games, 3-patch window 26.16-26.18.
  3. Veigar Mid - Low Elo data: Karthus Jungle vs Veigar Mid, 51.1% observed win rate, +3.7 percentage points vs expected, 738 games, 3-patch window 26.16-26.18.
  4. Yone Top - Low Elo data: Karthus Jungle vs Yone Top, 52.1% observed win rate, +3.5 percentage points vs expected, 739 games, 3-patch window 26.16-26.18.
  5. Jax Top - Low Elo data: Karthus Jungle vs Jax Top, 52.6% observed win rate, +3.0 percentage points vs expected, 529 games, 3-patch window 26.16-26.18.

Top 5 Low Elo Karthus strongest synergies

  1. Lulu Support - Low Elo data: Karthus Jungle vs Lulu Support, 53.5% observed win rate, +4.4 percentage points vs expected, 718 games, 3-patch window 26.16-26.18.
  2. Fizz Mid - Low Elo data: Karthus Jungle vs Fizz Mid, 55.2% observed win rate, +4.1 percentage points vs expected, 560 games, 3-patch window 26.16-26.18.
  3. Samira ADC - Low Elo data: Karthus Jungle vs Samira ADC, 52.5% observed win rate, +3.9 percentage points vs expected, 528 games, 3-patch window 26.16-26.18.
  4. Pyke Support - Low Elo data: Karthus Jungle vs Pyke Support, 51.0% observed win rate, +3.8 percentage points vs expected, 692 games, 3-patch window 26.16-26.18.
  5. Zed Mid - Low Elo data: Karthus Jungle vs Zed Mid, 51.9% observed win rate, +3.8 percentage points vs expected, 1,346 games, 3-patch window 26.16-26.18.

Top 5 Low Elo Karthus weakest synergies

  1. Veigar Mid - Low Elo data: Karthus Jungle vs Veigar Mid, 45.9% observed win rate, -4.7 percentage points vs expected, 536 games, 3-patch window 26.16-26.18.
  2. Gangplank Top - Low Elo data: Karthus Jungle vs Gangplank Top, 44.8% observed win rate, -4.1 percentage points vs expected, 507 games, 3-patch window 26.16-26.18.
  3. Ezreal ADC - Low Elo data: Karthus Jungle vs Ezreal ADC, 41.5% observed win rate, -3.8 percentage points vs expected, 1,124 games, 3-patch window 26.16-26.18.
  4. Lux Support - Low Elo data: Karthus Jungle vs Lux Support, 46.4% observed win rate, -2.4 percentage points vs expected, 1,083 games, 3-patch window 26.16-26.18.
  5. Renekton Top - Low Elo data: Karthus Jungle vs Renekton Top, 46.9% observed win rate, -2.3 percentage points vs expected, 512 games, 3-patch window 26.16-26.18.

Top 5 High Elo Karthus counter matchups

  1. Zed Mid - High Elo data: Karthus Jungle vs Zed Mid, 44.3% observed win rate, -5.7 percentage points vs expected, 607 games, 3-patch window 26.16-26.18.
  2. Lee Sin Jungle - High Elo data: Karthus ADC vs Lee Sin Jungle, 49.0% observed win rate, -5.6 percentage points vs expected, 526 games, 3-patch window 26.16-26.18.
  3. Lucian ADC - High Elo data: Karthus Jungle vs Lucian ADC, 46.9% observed win rate, -4.6 percentage points vs expected, 571 games, 3-patch window 26.16-26.18.
  4. Karma Support - High Elo data: Karthus Jungle vs Karma Support, 47.6% observed win rate, -3.7 percentage points vs expected, 624 games, 3-patch window 26.16-26.18.
  5. Seraphine Support - High Elo data: Karthus Jungle vs Seraphine Support, 46.4% observed win rate, -3.4 percentage points vs expected, 623 games, 3-patch window 26.16-26.18.

Top 5 High Elo champions Karthus is good against

  1. Yunara ADC - High Elo data: Karthus Jungle vs Yunara ADC, 54.2% observed win rate, +4.4 percentage points vs expected, 801 games, 3-patch window 26.16-26.18.
  2. Jinx ADC - High Elo data: Karthus ADC vs Jinx ADC, 56.2% observed win rate, +3.9 percentage points vs expected, 555 games, 3-patch window 26.16-26.18.
  3. Kai'Sa ADC - High Elo data: Karthus Jungle vs Kai'Sa ADC, 54.1% observed win rate, +3.4 percentage points vs expected, 1,523 games, 3-patch window 26.16-26.18.
  4. Lulu Support - High Elo data: Karthus Jungle vs Lulu Support, 52.9% observed win rate, +2.7 percentage points vs expected, 946 games, 3-patch window 26.16-26.18.
  5. Nautilus Support - High Elo data: Karthus Jungle vs Nautilus Support, 53.0% observed win rate, +2.7 percentage points vs expected, 775 games, 3-patch window 26.16-26.18.

Top 5 High Elo Karthus strongest synergies

  1. Qiyana Mid - High Elo data: Karthus Jungle vs Qiyana Mid, 56.5% observed win rate, +4.9 percentage points vs expected, 508 games, 3-patch window 26.16-26.18.
  2. Jhin ADC - High Elo data: Karthus Jungle vs Jhin ADC, 53.7% observed win rate, +4.4 percentage points vs expected, 1,202 games, 3-patch window 26.16-26.18.
  3. Graves Jungle - High Elo data: Karthus ADC vs Graves Jungle, 57.9% observed win rate, +3.9 percentage points vs expected, 556 games, 3-patch window 26.16-26.18.
  4. Aatrox Top - High Elo data: Karthus Jungle vs Aatrox Top, 52.9% observed win rate, +3.2 percentage points vs expected, 558 games, 3-patch window 26.16-26.18.
  5. Yasuo Mid - High Elo data: Karthus ADC vs Yasuo Mid, 56.5% observed win rate, +3.2 percentage points vs expected, 520 games, 3-patch window 26.16-26.18.

Top 5 High Elo Karthus weakest synergies

  1. Milio Support - High Elo data: Karthus Jungle vs Milio Support, 47.1% observed win rate, -3.1 percentage points vs expected, 535 games, 3-patch window 26.16-26.18.
  2. Thresh Support - High Elo data: Karthus Jungle vs Thresh Support, 49.6% observed win rate, -2.6 percentage points vs expected, 1,091 games, 3-patch window 26.16-26.18.
  3. Seraphine Support - High Elo data: Karthus Jungle vs Seraphine Support, 48.4% observed win rate, -2.3 percentage points vs expected, 517 games, 3-patch window 26.16-26.18.
  4. Jinx ADC - High Elo data: Karthus Jungle vs Jinx ADC, 50.3% observed win rate, -1.9 percentage points vs expected, 1,128 games, 3-patch window 26.16-26.18.
  5. Leona Support - High Elo data: Karthus ADC vs Leona Support, 54.7% observed win rate, -1.2 percentage points vs expected, 601 games, 3-patch window 26.16-26.18.