Due to hygiene concerns, charities tend to avoid used pillows.
Pillows & Bolsters
Blue Bins & Chutes
Pillows are welcome in Cloop bins
Cloop Life Line Bins
Give your old pillow a new life.
A new pillow cover can give an old throw pillow a new lease on life. And if it is getting flat, plump it up by combing the pollyfill from two pillows into one.
Likewise, old bedroom pillows can be reupholstered to use on sofas and outdoor seating. Even if a pillow no longer supports your head or shoulders while you sleep, it can still be comfortable to use. DIY or get it done professionally.
Freecycle / Give Away
Some people will take old pillows in order to reuse the stuffing.
Clean polyfill (a cotton like material made of plastic fibres) can be reused to stuff cushions or soft toys. It may be welcome by sewers, makers, and art projects.
Goodness Me! Fabric Destash
Singapore Really Really Free Market
Most charities will NOT accept used pillows.
Exception: if the pillow is in good condition, you can offer it to Its Raining Raincoats