Win on or in

[Tina3]

You can win on an election.

You can win in an election.
(Probably a parliamentary or presidential election.)

You can win in a race.

You can win on a race.
(Probably 100 meters in Olympics.)

What is the correct preposition is my question?

Of course, you can say someone can win the election or someone can win the race.

 

[Rover_KE]

Of course, you can say someone can win the election or someone can win the race.

Stick with what you know to be correct.

 

[emsr2d2]

The correct way to say both is not to use a preposition at all.

Win a race.
Win an election.

 

[GoesStation]

However, similar sentences require in: Voter turnout will be critical in an election like this one.

 

[teechar]

And the same goes for "race."
He came third in the race.

 

[juanitoh]

And the same goes for "race."
He came third in the race.

And this also works with an indefinite article:
He won in a non-championship race.

 

[teechar]

And this also works with an indefinite article:

I don't see how this is relevant here. The OP asked whether the given sentences work with "on" or "in."

 

[emsr2d2]

And this also works with an indefinite article:
He won in a non-championship race.

He won a non-championship race. No preposition.