Annie, 

Thank you for thinking of OSU Extension as a place to donate your jars! Many of our county programs do accept standard canning jars in good condition (clean, not chipped, etc.) to use in our classes. Your best option is to call the local county office to ask if they accept donated jars. You can find the full county office list here: https://extension.oregonstate.edu/find-us

Please let me know if you need any help locating a county office, and thanks for using Ask Extension!

Jared