Yellow Fever vaccination certificates are needed for the majority of nationalities. It’s possible that proof of vaccination is needed to get a visa, and it’ll be verified at the airport when you arrive.
A valid passport or travel document is required for all visitors to Sierra Leone. The nation does not need a visa for citizens of the Economic Community of West African States (ECOWAS). All other nations will need a visa, which may be obtained through Sierra Leone’s foreign embassies as well as at the country’s land borders. Visas are not difficult to get, and it is unlikely that anybody will be turned down unless the government has a compelling cause to prevent them from entering the nation. The cost of a visa varies greatly depending on your citizenship: US people pay about US$160 for one, UK residents pay £109 for a three-month visa obtained in London, German citizens pay €100, and most others pay as low as $40. For current rates, contact the local embassy (UK [www], USA [www]). It takes 72 hours to get a visa in Conakry, and even after that, the consul may ask for more money, so it is best to organize it in Monrovia or elsewhere. The embassy of Sierra Leone in The Gambia is an excellent location to obtain a visa, which costs $100 USD.