Great question! The wood you see on park benches is usually chosen for one job: surviving outdoors in rain, sun, snow, and heavy daily use without rotting, splintering, or falling apart. In my experience, the most common options are teak, ipe, white oak, cedar, redwood, black locust, and thermally modified ash or pine.
Teak is the classic choice because its natural oils resist moisture, insects, and decay, which is why it has been used on boats and outdoor furniture for generations. Ipe is even harder and denser, so it shows up in high-traffic urban parks. Cedar and redwood are lighter and naturally rot-resistant, but they dent more easily. White oak is strong, widely available, and takes finishes well. Black locust wood is one of my favorite sustainable park bench wood options: it is grown in North America, extremely rot-resistant, and often harvested from managed woodlands. Thermally modified woods are also becoming popular because heat and steam give softer species the durability of tropical hardwoods without chemical treatment.
Now, is it sustainably sourced? The honest answer is that it depends on the species and the supplier. Teak and ipe can be sustainable if they are FSC certified wood, but both have supply chains with a history of illegal logging and habitat loss in some regions. That does not mean you should avoid them entirely—just look for FSC certification or reclaimed sources. Domestic woods like white oak, cedar, redwood, and black locust tend to be easier to verify because they often come from well-regulated forests in North America or Europe. Reclaimed wood is another smart route: it reuses old beams, barn siding, or industrial timbers, so no new trees are cut down. Local sourcing also reduces transportation impacts and supports regional forestry jobs.
If you want a durable outdoor wood that checks the sustainability box, black locust or FSC-certified white oak are excellent places to start. And if you want an eco-friendly bench material, thermally modified ash or reclaimed teak can perform beautifully without the guilt. A well-made bench from responsibly sourced wood can last 20 to 40 years, which is a solid return on the planet’s investment.