Grainy RAW pictures? ISO 200?

So i'm beginning to search RAW photography, but when i shoot an image, there's always visible grain. How do i stop this?

On a nikon d5000

Added (1). Raw, as in digital, not jpeg.

What is the smallest ISO number you have, use that. I used to use ISO 12 or 15 Film to make grain as small as possible.

When you take a photo with a camera that saves as jpeg, it is making all the decisions with regards to brightness/exposure/blur/contrast etc. When shooting in RAW, the image is… Raw. It is then up to you to apply these settings, hence RAW files usually look a bit grainy until they have been processed. (try shooting RAW+JPG to see what i mean). Use either photoshop / photoshop elements or GIMP (free!) to 'process' your images, where you will have control on how much sharpening, masking and noise reduction you want to apply.

All cameras have native iso. Like canon eos native iso is 640. If you increase and cutdown the iso it will cause you noise images… Always with iso range in between 640 to 800, in any digital camera.shoot in raw gives you sharp and original images with all metadata… You can chage the image what you would desire…

Perhaps the ISO sensitivity auto control is set to ON. What this does is, if you manually set the ISO and, the camera decides it can't expose properly at that ISO, it will automatically override the ISO you have set.
To check if this feature is enabled, press Menu, then scroll to SHOOTING MENU, scroll to ISO sensitivity settings, press right scroll button and you will see ISO sensitivity control followed by ON or OFF. If ON then switch it OFF.

I suspect that AUTO ISO is switched on. This will apply even if you shoot manual exposure settings. You need to switch it off.

Are you looking at the raw image on the back of the camera LCD or do you mean when viewed on the computer? If it's the back of the camera, that's not actually a raw image (even if you are shooting in raw) - it's displayed as a jpg.
If it's when you view on the computer & you have switched Auto ISO off, then can you post an example of what you are seeing on a photo sharing site (post as a TIFF) and add a link. Without being able to see an example, it's difficult to judge.

In your RAW processing software there should be a de-noise function. Use that.

Unlike JPEG images which are processed in the camera (the camera does the noise reduction), when you shoot RAW the camera processes nothing, so you need to add the noise reduction yourself.

There's no "grain" at all -- grain is a film characteristic, and digital images have no such thing.

If you meant noise, then you're likely underexposing your images; whether you shoot in RAW or JPG, underexposure will decrease the signal to noise ratio, and noise will be more visible. Make sure you expose correctly.

Finally, check the default noise reduction settings of your RAW converter; in-camera JPGs often get a bit of noise reduction even at lower ISOs, you might need to apply just a bit in your RAW conversion. But a properly-exposed ISO 200 shot on your camera should have very, very little visible noise.