What is a good musical key to use for a jazz piece?

I wanted to write a jazz combo, I have an idea, but I am not sure which key I should write it in. I want it to sound "funky"

There is no such thing as a 'good' or 'funky' key to use - they're all good! Most jazz standards are in F, Bb or Eb, but some are written to accommodate the voice in E, C and D. Any musician worth their salt should be able to play in whatever key you put in front of them. Major keys denote more upbeat and lively tunes, minor keys are good for ballads and modal changes for grooves. Making a tune 'funky' is dependent on the rhythms and changes, not the key.

If you have a horn section, write in flat keys like F or Eflat.

try minor and diminished keys to start with... but from there, I think the key element in a lot of great jazz songs is good key changes. just go through a few scales and see which you like in which progressions.

In jazz you can have play any song in any key...thats what move of the greats would do...they would learn every song they had in their memories and they'd learn them in every key. Of course for horn players certain keys are better or easier than others but that doesn't mean much. Plus a lot of great jazz songs change keys throughout or just go from the major key or minor key to the opposite such as the famous autumn leaves. It really comes down to what you want. A lot of famous jazz guys such as Charlie Parker had different feelings for different keys that really depended on what style he was writing.

it really doesn't matter musically, it's all relative. so let the lead instrument call it. if it's a sax or trumpet, pick Eb or another good horn key.
oh, it has nothing to do with the key but use a lot of 9th chords!!! for the funk of it...

Try Eb, Bb or F. To sound funky you can try to use dominant #9 cords, of course to sound funky the groove is very important.

idk

Eb..period
second choice,because " the piano man" is complaining.......
F mayor.(ii,IV,V) do not use chords higher than 7 mayor.

Cmaj. the best.

I'd be inclined to say stick with the sharp keys. Think about it - if you have saxes and trumpets, they're all in flat keys so if you write in a flat key, they are going to have lots of flats, but if you go with D or G major, no one is going to have more than 2 sharps or flats.

If you're ansking this question, you probably don't know anything about jazz, and shouldn't write writing a jazz song. Sorry

Steve S. has it right!!!!