Which English word represents the sign of "#" ?

I say "pound" or "pound sign".
I have heard "hash mark", and I have heard "number sign", also.

I'm sure others will weigh in on the pound sign!

Hi CalifJim, you are confusing me there, maybe this symbol is showing up differently on my computer or do American's really call this a pound sign?

£ - this is a pound sign. It is used for English (sterling) pounds i.e. I lent my son £5 yesterday. So what is this called in America?

# - in England this is called a hash mark. I'd be interested in knowing if it really is call

'Pound sign' as in weight, e.g. 15# for 15lb.

This sign is also known as 'hache'.

This thread is getting a little scattered, so sorry if I repeat anyone:

£ -- this is a pound (sterling) in the US too.

# -- this is a pound of weight ( = 'lb'); it is also used as a number sign (Typhoon # 23 just roared through Yokohama); it is also the 'sharp' sign in music ( Concerto in F# maj).

There may be other functions for this versatile symbol. (It may, for in

Since we don't use (sterling) pounds in the U.S., its symbol is not on our keyboards!
So there's no ambiguity for an American about which symbol a "pound sign" is. It's #!