| Language | Population | Country | Religion | Christian | Evangelical | NT | Engaged |
|---|---|---|---|---|---|---|---|
| Mende | 1,692,000 | Sierra Leone | Islam | 13% | 7% | Complete | Engaged |
| Themne | 1,404,000 | Sierra Leone | Islam | 7% | 3% | Complete | Engaged |
| Krio | 726,000 | Sierra Leone | Christianity | 45% | 5% | Complete | Engaged |
| Limba, West-Central | 369,000 | Sierra Leone | Islam | 14% | 1% | Complete | Engaged |
| Kuranko | 347,000 | Sierra Leone | Ethnic | 4% | 0.40% | Complete | Engaged |
| Kono | 264,000 | Sierra Leone | Ethnic | 12% | 1% | Complete | Engaged |
| Pular | 236,000 | Sierra Leone | Islam | 0.00% | 0.00% | Complete | Engaged |
| Sherbro | 209,000 | Sierra Leone | Ethnic | 8% | 2% | Incomplete | Engaged |
| Loko | 164,000 | Sierra Leone | Ethnic | 5% | 0.90% | Complete | Engaged |
| Susu | 145,000 | Sierra Leone | Islam | 0.00% | 0.00% | Complete | Engaged |
| Maninkakan, Eastern | 140,000 | Sierra Leone | Islam | 3% | 0.50% | Complete | Engaged |
| Kisi, Southern | 133,000 | Sierra Leone | Ethnic | 10% | 1% | Complete | Engaged |
| Kissi, Northern | 61,100 | Sierra Leone | Ethnic | 5% | 2% | Complete | Engaged |
| Yalunka | 41,300 | Sierra Leone | Islam | 1% | 0.10% | Complete | Engaged |
| Arabic, North Levantine Spoken | 37,500 | Sierra Leone | Islam | 32% | 0.50% | Incomplete | Engaged |
| Vai | 23,700 | Sierra Leone | Islam | 0.20% | 0.10% | Complete | Engaged |
| Krim | 13,900 | Sierra Leone | Ethnic | 8% | 2% | Incomplete | Engaged |
| Gola | 12,400 | Sierra Leone | Islam | 3% | 0.60% | Incomplete | Engaged |
| Hindi | 11,900 | Sierra Leone | Hinduism | 4% | 0.20% | Complete | Unengaged |
| Klao | 11,400 | Sierra Leone | Christianity | 90% | 4% | Complete | Engaged |
| Bullom So | 9,910 | Sierra Leone | Islam | 5% | 2% | Incomplete | Engaged |
| Bassa | 6,800 | Sierra Leone | Ethnic | 43% | 4% | Complete | Engaged |
| Bom | 6,620 | Sierra Leone | Ethnic | 5% | 0.50% | Incomplete | Engaged |
| Yoruba | 5,010 | Sierra Leone | Christianity | 47% | 3% | Complete | Engaged |
| English | 2,200 | Sierra Leone | Christianity | 60% | 8% | Complete | Engaged |
| Greek | 940 | Sierra Leone | Christianity | 91% | 0.40% | Complete | Engaged |
| Limba, East | 710 | Sierra Leone | Islam | 15% | 3% | Incomplete | Engaged |
| French | 310 | Sierra Leone | Christianity | 61% | 1% | Complete | Engaged |