If you can’t donate your old office furniture, look into recycling it. Instead of letting your chair slowly decompose in a landfill while emitting toxic greenhouse gasses, allow it to be given new life and reused. You can see if your office chair is recyclable by checking its main material composition.
If your chair is made of metal, it's likely recyclable. Metal chairs are generally made out of steel, and they can be recycled into other products.
Plastic office chairs are less likely to be recyclable, but this ultimately depends on the type of plastic they’re made of. Look for a small triangle with a number (resin identification code) on your chair to identify what type of plastic it is made of. Plastic #2 (high-density polyethylene/ HDPE) or #5 (polypropylene) are common, and can both be recycled.
Wooden office chairs are usually not recyclable because they're solid wood and cannot be broken down into smaller pieces for recycling purposes.