| Pennwyn, Pennsylvania | |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Pennsylvania#USA |
| Pushpin Label: | Pennwyn |
| Pushpin Label Position: | bottom |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Pennsylvania |
| Subdivision Type2: | County |
| Subdivision Name2: | Berks |
| Subdivision Type3: | Township |
| Subdivision Name3: | Cumru |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 1.39 |
| Area Land Km2: | 1.38 |
| Area Water Km2: | 0.01 |
| Population As Of: | 2020 |
| Population Footnotes: | [2] |
| Population Total: | 888 |
| Population Density Km2: | 645.36 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Coordinates: | 40.2942°N -75.9769°W |
| Postal Code Type: | ZIP codes |
| Area Code: | 610 & 484 |
| Blank Name: | FIPS code |
| Blank Info: | 42-59304 |
| Blank1 Name: | GNIS feature ID |
| Area Total Sq Mi: | 0.54 |
| Area Land Sq Mi: | 0.53 |
| Area Water Sq Mi: | 0.01 |
| Population Density Sq Mi: | 1672.32 |
Pennwyn is a census-designated place[3] in Cumru Township, Berks County, Pennsylvania, United States. It is located just to the east of the borough of Mohnton. As of the 2010 census, the population was 780 residents.[4]