14 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Waco | 1 | 149,640 | 140,543 | 1.02% | 1,644 | 91 | City |
| Hewitt | 2 | 17,088 | 16,070 | 1% | 2,481 | 7 | City |
| Bellmead | 3 | 10,656 | 10,509 | 0.24% | 1,544 | 7 | City |
| Woodway | 4 | 9,819 | 9,420 | 0.69% | 1,491 | 7 | City |
| Lacy-Lakeview | 5 | 7,288 | 7,210 | 0.18% | 1,674 | 4 | City |
| West | 6 | 2,617 | 2,557 | 0.38% | 1,533 | 2 | City |
| Mart | 7 | 1,871 | 1,786 | 0.75% | 1,359 | 1 | City |
| Beverly Hills | 8 | 1,833 | 1,874 | -0.38% | 2,786 | 1 | City |
| Lorena | 9 | 1,799 | 1,783 | 0.17% | 467 | 4 | City |
| Moody | 10 | 1,652 | 1,556 | 0.98% | 1,186 | 1 | City |
| Riesel | 11 | 1,070 | 1,049 | 0.38% | 257 | 4 | City |
| Crawford | 12 | 944 | 892 | 0.96% | 655 | 1 | Town |
| Leroy | 13 | 357 | 359 | 0% | 193 | 2 | City |
| Ross | 14 | 199 | 198 | 0% | 129 | 2 | City |
Waco is the largest city in McLennan County, with a population of 149,640.
Ross is the smallest city in McLennan County, with a population of 199.
There are 14 cities in McLennan County, Texas.