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 2026-11-15. Data is current for LoL patch 26.22 (all regions, low elo and high elo).

Karthus role performance snapshot

  1. Karthus Jungle stats - Karthus Jungle has 49.2% win rate, 1.3% pick rate, and 14,370 ranked games in the current RiftMind data set. Win rate changed +0.3 percentage points from the comparison patch. Pick rate changed +0.0 percentage points from the comparison patch.
  2. Karthus ADC stats - Karthus ADC has 52.7% win rate, 0.2% pick rate, and 2,619 ranked games in the current RiftMind data set. Win rate changed +0.1 percentage points from the comparison patch. Pick rate changed -0.1 percentage points from the comparison patch.
  3. Karthus Mid stats - Karthus Mid has 48.0% win rate, 0.2% pick rate, and 1,753 ranked games in the current RiftMind data set. Win rate changed +0.5 percentage points from the comparison patch. Pick rate changed +0.0 percentage points from the comparison patch.
  4. Karthus Top stats - Karthus Top has 47.7% win rate, 0.1% pick rate, and 1,012 ranked games in the current RiftMind data set. Win rate changed +0.4 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. Mordekaiser Top - Low Elo data: Karthus Jungle vs Mordekaiser Top, 45.6% observed win rate, -1.6 percentage points vs expected, 1,990 games, 3-patch window 26.20-26.22.
  2. Master Yi Jungle - Low Elo data: Karthus Jungle vs Master Yi Jungle, 44.4% observed win rate, -1.6 percentage points vs expected, 2,036 games, 3-patch window 26.20-26.22.
  3. Soraka Support - Low Elo data: Karthus Jungle vs Soraka Support, 42.5% observed win rate, -1.3 percentage points vs expected, 1,175 games, 3-patch window 26.20-26.22.
  4. Yuumi Support - Low Elo data: Karthus Jungle vs Yuumi Support, 45.7% observed win rate, -1.2 percentage points vs expected, 1,178 games, 3-patch window 26.20-26.22.
  5. Cho'Gath Jungle - Low Elo data: Karthus Jungle vs Cho'Gath Jungle, 43.4% observed win rate, -1.1 percentage points vs expected, 1,642 games, 3-patch window 26.20-26.22.

Top 5 Low Elo champions Karthus is good against

  1. Shaco Jungle - Low Elo data: Karthus Jungle vs Shaco Jungle, 54.8% observed win rate, +2.3 percentage points vs expected, 1,607 games, 3-patch window 26.20-26.22.
  2. Samira ADC - Low Elo data: Karthus Jungle vs Samira ADC, 53.1% observed win rate, +1.7 percentage points vs expected, 1,047 games, 3-patch window 26.20-26.22.
  3. Briar Jungle - Low Elo data: Karthus Jungle vs Briar Jungle, 50.3% observed win rate, +1.5 percentage points vs expected, 1,387 games, 3-patch window 26.20-26.22.
  4. Xayah ADC - Low Elo data: Karthus Jungle vs Xayah ADC, 48.7% observed win rate, +1.3 percentage points vs expected, 1,382 games, 3-patch window 26.20-26.22.
  5. Thresh Support - Low Elo data: Karthus Jungle vs Thresh Support, 51.0% observed win rate, +1.3 percentage points vs expected, 2,718 games, 3-patch window 26.20-26.22.

Top 5 Low Elo Karthus strongest synergies

  1. Zed Mid - 50.7% win rate with Karthus Jungle (+3.0 points vs expected), 2,905 games.
  2. Yasuo Mid - 50.8% win rate with Karthus Jungle (+2.8 points vs expected), 3,260 games.
  3. Yone Mid - 51.4% win rate with Karthus Jungle (+1.9 points vs expected), 3,692 games.
  4. Blitzcrank Support - 52.2% win rate with Karthus Jungle (+1.1 points vs expected), 1,778 games.
  5. Nautilus Support - 50.4% win rate with Karthus Jungle (+1.1 points vs expected), 2,987 games.

Top 5 Low Elo Karthus weakest synergies

  1. Syndra Mid - 44.2% win rate with Karthus Jungle (-1.9 points vs expected), 1,283 games.
  2. Malzahar Mid - 48.3% win rate with Karthus Jungle (-1.4 points vs expected), 1,474 games.
  3. Veigar Mid - 45.6% win rate with Karthus Jungle (-1.4 points vs expected), 1,178 games.
  4. Lux Support - 47.7% win rate with Karthus Jungle (-1.1 points vs expected), 2,539 games.
  5. Galio Mid - 45.2% win rate with Karthus Jungle (-1.1 points vs expected), 1,037 games.

Top 5 High Elo Karthus counter matchups

  1. Yuumi Support - High Elo data: Karthus Jungle vs Yuumi Support, 46.7% observed win rate, -2.7 percentage points vs expected, 1,026 games, 3-patch window 26.20-26.22.
  2. Nami Support - High Elo data: Karthus Jungle vs Nami Support, 46.7% observed win rate, -1.9 percentage points vs expected, 1,762 games, 3-patch window 26.20-26.22.
  3. Lulu Support - High Elo data: Karthus Jungle vs Lulu Support, 47.7% observed win rate, -1.5 percentage points vs expected, 2,533 games, 3-patch window 26.20-26.22.
  4. Milio Support - High Elo data: Karthus Jungle vs Milio Support, 49.4% observed win rate, -1.3 percentage points vs expected, 1,157 games, 3-patch window 26.20-26.22.
  5. Karma Support - High Elo data: Karthus Jungle vs Karma Support, 50.7% observed win rate, -1.3 percentage points vs expected, 1,756 games, 3-patch window 26.20-26.22.

Top 5 High Elo champions Karthus is good against

  1. Alistar Support - High Elo data: Karthus Jungle vs Alistar Support, 50.5% observed win rate, +2.4 percentage points vs expected, 1,342 games, 3-patch window 26.20-26.22.
  2. Leona Support - High Elo data: Karthus Jungle vs Leona Support, 52.3% observed win rate, +2.3 percentage points vs expected, 1,425 games, 3-patch window 26.20-26.22.
  3. Kha'Zix Jungle - High Elo data: Karthus Jungle vs Kha'Zix Jungle, 54.3% observed win rate, +1.9 percentage points vs expected, 1,421 games, 3-patch window 26.20-26.22.
  4. Qiyana Jungle - High Elo data: Karthus Jungle vs Qiyana Jungle, 55.1% observed win rate, +1.6 percentage points vs expected, 1,738 games, 3-patch window 26.20-26.22.
  5. Blitzcrank Support - High Elo data: Karthus Jungle vs Blitzcrank Support, 50.5% observed win rate, +1.5 percentage points vs expected, 1,433 games, 3-patch window 26.20-26.22.

Top 5 High Elo Karthus strongest synergies

  1. Zed Mid - 53.0% win rate with Karthus Jungle (+2.2 points vs expected), 2,822 games.
  2. Qiyana Mid - 53.9% win rate with Karthus Jungle (+1.7 points vs expected), 1,043 games.
  3. Yasuo Mid - 55.2% win rate with Karthus ADC (+1.2 points vs expected), 1,169 games.
  4. Nautilus Support - 52.3% win rate with Karthus Jungle (+1.1 points vs expected), 2,419 games.
  5. Yasuo Mid - 50.3% win rate with Karthus Jungle (+1.0 points vs expected), 2,157 games.

Top 5 High Elo Karthus weakest synergies

  1. Syndra Mid - 46.4% win rate with Karthus Jungle (-1.6 points vs expected), 1,111 games.
  2. Senna Support - 49.8% win rate with Karthus Jungle (-0.9 points vs expected), 1,007 games.
  3. Nami Support - 48.3% win rate with Karthus Jungle (-0.7 points vs expected), 1,794 games.
  4. Viktor Mid - 47.9% win rate with Karthus Jungle (-0.6 points vs expected), 1,014 games.
  5. Lulu Support - 51.2% win rate with Karthus Jungle (-0.6 points vs expected), 2,607 games.

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.