Sierra Leone er inndelt i tre provinser: Northern, Eastern, Southern, og North West (2017) samt en region som kalles Western. Provinsene er i sin tur delt inn i tolv distrikt, og Western (hovedstadsområdet) i to distrikt.
thumb|Sierra Leones distriker. Distrikt Administrasjons-sentrum Provins Areal Preliminary Report of the Final Results of the first digital census 2021 in Sierra Leone. Statistics Sierra Leone Innbyggertall(2021) Bombali Makeni Northern 3884 387236 Falaba Bendugu Northern 7423 166205 Koinadugu Kabala Northern 4951 206133 Tonkolili Magburaka Northern 6288 557257 Kambia Kambia North West 3125 367699 Karene Kamakwie North West 5828 290313 Port Loko Port Loko North West 4666 528038 Kenema Kenema Eastern 6364 772472 Kono Koidu Eastern 5412 620703 Kailahun Kailahun Eastern 3859 550435 Bo Bo Southern 5463 756975 Bonthe Mattru Jong Southern 3590 297561 Pujehun Pujehun Southern 4192 429574 Moyamba Moyamba Southern 6971 346771 Western Area Urban Freetown Western 82 609174 Western Area Rural Waterloo Western 614 662156
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