| Cedar Crest, Pennsylvania | |
| Official Name: | Lucy Furnace |
| Settlement Type: | census-designated place |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Pennsylvania |
| Subdivision Type2: | County |
| Subdivision Name2: | Mifflin |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 0.56 |
| Area Land Km2: | 0.56 |
| Area Water Km2: | 0.00 |
| Population As Of: | 2020 |
| Population Total: | 157 |
| Population Density Km2: | 278.80 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Postal Code Type: | ZIP codes |
| Blank Name: | FIPS code |
| Blank Info: | 42-11836 |
| Blank1 Name: | GNIS feature ID |
| Area Total Sq Mi: | 0.22 |
| Area Land Sq Mi: | 0.22 |
| Area Water Sq Mi: | 0.00 |
| Population Density Sq Mi: | 723.50 |
Cedar Crest is a census-designated place[2] located in Wayne Township, Mifflin County in the state of Pennsylvania, United States. It is located very close to the borough of Mount Union, along US 22. As of the 2010 census, the population was 195 residents.