Honestly, assuming you mean a standard 20-foot shipping container, the realistic answer is about 18 to 40 fully assembled park benches, or roughly 100 to 200 if the benches are flat-packed or knocked down.
There’s no universal number because park benches come in different sizes. A typical commercial park bench is around 5 to 6 feet long, about 2 to 2.5 feet deep, and roughly 3 feet high with the backrest. A standard 20-foot container has about 19 feet 4 inches of usable length, 7 feet 8 inches of width, and 7 feet 10 inches of height.
If you load assembled 6-foot benches in a simple grid, you can fit about 3 along the length, 3 across the width, and stack 2 high, which works out to roughly 18 benches. If the benches are smaller, stack well, or have removable legs, you can often get 30 to 40 in the same container. Flat-packed park benches are a different story. Once the legs, backrests, and seat slats are separated and packed tightly, the volume per bench drops sharply, so a standard 20-foot crate can often hold 100 to 200 units depending on packaging.
For planning, use 18 to 40 as a safe range for assembled benches, and always ask your freight forwarder to check actual dimensions and stacking limits before booking.