The 2025 Boston Marathon had 31,670 official entrants , about 28,845 runners started , and roughly 28,284 finished the race.

Quick Scoop

  • Officially entered runners: 31,670.
  • Runners who started in Hopkinton: 28,845.
  • Official finishers: 28,284 (about 98.4% of starters).
  • Finishers by gender: 16,103 men , 12,210 women , 71 non-binary runners.

If you’re asking “how many runners in Boston Marathon 2025,” the clearest single number to quote is that about 28.8K runners actually started , and about 28.3K finished the 2025 race.

Information gathered from public forums or data available on the internet and portrayed here.