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The largest marathons by continent, as of 2016, are:

• North America: New York City
• Europe: Paris
• Asia: Tokyo International
• Africa: Soweto
• South America: Buenos Aires
• Australia: Melbourne

(Source: ARRS.)

South Africa's Comrades Marathon would be considered, but it is actually an ultramarathon.

South America has a very big Sao Silvestre race in Brazil (New Year's Eve traditionally has multiple Saint Silvester races worldwide) but it's 15km, not a marathon, despite being listed as one in several places.

The largest marathons by continent, as of 2016, are:

• North America: New York City
• Europe: Paris
• Asia: Tokyo International
• Africa: Soweto
• South America: Buenos Aires
• Australia: Melbourne

(Source: ARRS.)

South Africa's Comrades Marathon would be considered, but it is actually an ultramarathon.

South America has a very big Sao Silvestre race in Brazil (New Year's Eve traditionally has multiple Saint Silvester races worldwide) but it's 15km, not a marathon, despite being listed as one in several places.

The largest marathons by continent, as far as I can tell as of 2011, are:

• North America: New York City (still true as of 2015)
• Europe: London (Surpassed by Paris in 2015)
• Asia: Tokyo International

(Source: 2012 Running USA "State of the Sport" report.)

There are no marathons from South America, Africa, or Australia listed in the top 50 biggest races in the world, or top 20 marathons. South Africa's Comrades Marathon would be considered, but it is actually an ultramarathon; that country's engagement with running as a sport suggests their largest marathon might be the largest on the continent, but I'd consider the one in Addis Abbaba (Ethiopia) as well. In Australia I'd naturally look at Sydney first. South America has a very big Sao Silvestre race in Rio (New Year's Eve traditionally has multiple Saint Silvester races worldwide) but it's not a marathon.

The largest marathons by continent, as of 2016, are:

• North America: New York City
• Europe: Paris
• Asia: Tokyo International
• Africa: Soweto
• South America: Buenos Aires
• Australia: Melbourne

(Source: ARRS.)

South Africa's Comrades Marathon would be considered, but it is actually an ultramarathon. 

South America has a very big Sao Silvestre race in Brazil (New Year's Eve traditionally has multiple Saint Silvester races worldwide) but it's 15km, not a marathon, despite being listed as one in several places.

The largest marathons by continent, as far as I can tell as of 2011, are:

• North America: New York City (still true as of 2015)
• Europe: London (Surpassed by Paris in 2015)
• Asia: Tokyo International

(Source: 2012 Running USA "State of the Sport" report.)

There are no marathons from South America, Africa, or Australia listed in the top 50 biggest races in the world, or top 20 marathons. South Africa's Comrades Marathon would be considered, but it is actually an ultramarathon; that country's engagement with running as a sport suggests their largest marathon might be the largest on the continent, but I'd consider the one in Addis Abbaba (Ethiopia) as well. In Australia I'd naturally look at Sydney first. South America has a very big Sao Silvestre race in Rio (New Year's Eve traditionally has multiple Saint Silvester races worldwide) but it's not a marathon.

The largest marathons by continent, as far as I can tell as of 2011, are:

• North America: New York City (still true as of 2015)
• Europe: London (Surpassed by Paris in 2015)
• Asia: Tokyo International

(Source: 2012 Running USA "State of the Sport" report.)

There are no marathons from South America, Africa, or Australia listed in the top 50 biggest races in the world, or top 20 marathons. South Africa's Comrades Marathon would be considered, but it is actually an ultramarathon; that country's engagement with running as a sport suggests their largest marathon might be the largest on the continent, but I'd consider the one in Addis Abbaba (Ethiopia) as well. In Australia I'd naturally look at Sydney first. South America has a very big Sao Silvestre race in Rio (New Year's Eve traditionally has multiple Saint Silvester races worldwide) but it's not a marathon.