There are 31 cities in Lehigh County, Pennsylvania.
Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | 2024 Population | 2020 Population | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Allentown | 1 | 124,597 | 125,727 | -0.23% | 7,094 | 17.6 | City |
| Bethlehem | 2 | 79,167 | 75,699 | 1.11% | 4,142 | 19.1 | City |
| Lower Macungie township | 3 | 32,517 | 32,413 | -0.02% | 1,453 | 22.4 | Township |
| Upper Macungie township | 4 | 29,120 | 26,485 | 2.2% | 1,116 | 26.1 | Township |
| Whitehall township | 5 | 29,098 | 29,167 | -0.04% | 2,315 | 12.6 | Township |
| South Whitehall township | 6 | 21,528 | 21,067 | 0.58% | 1,261 | 17.1 | Township |
| Upper Saucon township | 7 | 17,988 | 16,981 | 1.98% | 735 | 24.5 | Township |
| North Whitehall township | 8 | 15,754 | 15,637 | 0.01% | 561 | 28.1 | Township |
| Salisbury township | 9 | 13,548 | 13,627 | -0.14% | 1,211 | 11.2 | Township |
| Emmaus | 10 | 12,142 | 11,641 | 1.04% | 4,194 | 2.9 | Borough |
| Quakertown | 11 | 9,214 | 9,345 | -0.36% | 4,528 | 2.0 | Borough |
| Upper Milford township | 12 | 8,198 | 7,816 | 1.11% | 456 | 18.0 | Township |
| Washington township | 13 | 6,558 | 6,544 | -0.01% | 278 | 23.6 | Township |
| Catasauqua | 14 | 6,454 | 6,512 | -0.23% | 4,995 | 1.3 | Borough |
| Weisenberg township | 15 | 5,031 | 4,974 | 0.5% | 188 | 26.8 | Township |
| Fountain Hill | 16 | 4,789 | 4,824 | -0.19% | 6,516 | 0.7 | Borough |
| Lynn township | 17 | 4,249 | 4,236 | 0.09% | 103 | 41.3 | Township |
| Slatington | 18 | 4,240 | 4,279 | -0.24% | 3,210 | 1.3 | Borough |
| Kutztown | 19 | 4,166 | 4,157 | 0.05% | 2,604 | 1.6 | Borough |
| Lower Milford township | 20 | 3,836 | 3,858 | -0.13% | 195 | 19.7 | Township |
| Coplay | 21 | 3,544 | 3,342 | 1.43% | 5,810 | 0.6 | Borough |
| Heidelberg township | 22 | 3,336 | 3,326 | 0.03% | 135 | 24.6 | Township |
| Macungie | 23 | 3,265 | 3,255 | 0.06% | 3,301 | 1.0 | Borough |
| East Greenville | 24 | 3,154 | 3,164 | -0.1% | 6,160 | 0.5 | Borough |
| North Catasauqua | 25 | 3,030 | 2,970 | 0.5% | 4,220 | 0.7 | Borough |
| Freemansburg | 26 | 2,902 | 2,869 | 0.28% | 4,164 | 0.7 | Borough |
| Alburtis | 27 | 2,572 | 2,591 | -0.19% | 3,638 | 0.7 | Borough |
| Coopersburg | 28 | 2,495 | 2,458 | 0.36% | 2,674 | 0.9 | Borough |
| Lowhill township | 29 | 2,326 | 2,288 | 0.61% | 166 | 14.0 | Township |
| Hanover township | 30 | 1,674 | 1,687 | -0.18% | 397 | 4.2 | Township |
| Trumbauersville | 31 | 893 | 901 | -0.22% | 2,007 | 0.4 | Borough |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Allentown is the largest city in Lehigh County.
Trumbauersville is the smallest city in Lehigh County.
There are 31 cities in Lehigh County, Pennsylvania.