which side are you

[chance22]

I have always taken it for granted that when making question we should say “Which side are you on?” Is it possible to omit the preposition “on” in oral English, esp. American English? Is the preposition often omitted?
I wonder how it’s used in daily English.

 

[probus]

It is never possible to omit the "on".

 

[tedmc]

Answer the question yourself to see if you can omit the preposition:

I am on xxx side.

 

[emsr2d2]

I have always taken it for granted that when [STRIKE]making[/STRIKE] using the question "Which side are you on?", we [STRIKE]should say “Which side are you on?”[/STRIKE] must include the word "on".

Is it possible to omit the preposition “on” in oral English, especially American English? Is the preposition often omitted? I wonder how it’s used in daily English.

Note my revision of your opening sentence.

 

[Tdol]

It sounds weird in British English without the preposition.

 

[Charlie Bernstein]

In American English, it's always "Which side are you on?"

"On which side are you?" is unnatural, and "Which side are you?" is just plain dead wrong.

Here's an American: