These include 23 vacancies for delivery drivers in Bitterne Manor, Hedge End, Romsey, Sandown, Totton, Ventnor, and Southampton.
Southampton will also see 184 vacancies for mail sorters and there are 10 vacancies for 7.5-tonne and HGV drivers.
The seasonal roles will run from late October to early January 2026.
Royal Mail interim chief operating officer, Jamie Stephenson, said: “As we do every year, we will be pulling out all the stops to make Christmas special for our customers.
“It’s the busiest time for us, and we work tirelessly behind the scenes—planning months in advance—to ensure everything runs smoothly.
“From delivering festive parcels to supporting online shopping, we’re investing heavily in extra resources, including thousands of seasonal team members, to help make sure every delivery arrives on time and with care.”
No previous experience is required, and shift working is available.