<p>Acute Flaccid Paralysis (AFP) surveillance is the gold standard for surveillance in the polio eradication initiative. In Sierra Leone, the last case of wild polio virus was detected in 2010. However, in 2020, the country experienced an outbreak of circulating vaccine-derived poliovirus type 2 (cVDPV2). We aimed to describe and evaluate the AFP surveillance performance in Sierra Leone using the World Health Organization (WHO) performance indicators.</p>