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 Pop. | 2020 Pop. | Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Portage | 1 | 38,697 | 37,959 | 0.48% | 1,510 | 25.6 | City |
| Valparaiso | 2 | 34,782 | 34,162 | 0.45% | 2,073 | 16.8 | City |
| Chesterton | 3 | 14,785 | 14,273 | 0.87% | 1,572 | 9.4 | Town |
| South Haven | 4 | 7,563 | 5,017 | 2.2% | 3,329 | 2.3 | CDP |
| Porter | 5 | 5,204 | 5,202 | 0% | 845 | 6.2 | Town |
| Hebron | 6 | 3,730 | 3,749 | -0.13% | 1,865 | 2.0 | Town |
| Shorewood Forest | 7 | 3,300 | 2,931 | 1.32% | 1,738 | 1.9 | CDP |
| Burns Harbor | 8 | 2,163 | 2,077 | 0.98% | 336 | 6.4 | Town |
| Kouts | 9 | 2,061 | 2,032 | 0.34% | 1,699 | 1.2 | Town |
| Salt Creek Commons | 10 | 1,810 | 1,941 | -1.2% | 4,866 | 0.4 | CDP |
| Aberdeen | 11 | 1,736 | 1,698 | -0.57% | 1,381 | 1.3 | CDP |
| Ogden Dunes | 12 | 1,170 | 1,181 | -0.26% | 1,575 | 0.7 | Town |
| Beverly Shores | 13 | 603 | 601 | 0% | 168 | 3.6 | Town |
| Town Pines | 14 | 594 | 594 | 0% | 263 | 2.3 | Town |
| Dune Acres | 15 | 234 | 234 | 0% | 110 | 2.1 | Town |
| Wheeler | 16 | 107 | 229 | -18.32% | 40 | 2.7 | CDP |
| Boone Grove | 17 | 34 | 0 | 9.68% | 125 | 0.3 | CDP |
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.
Portage is the largest city in Porter County.
Boone Grove is the smallest city in Porter County.
There are 17 cities in Porter County, Indiana.