| Foster Brook, Pennsylvania | |
| Settlement Type: | census-designated place |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Pennsylvania |
| Subdivision Type2: | County |
| Subdivision Name2: | McKean |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 8.21 |
| Area Land Km2: | 8.16 |
| Area Water Km2: | 0.05 |
| Population As Of: | 2020 |
| Population Footnotes: | [2] |
| Population Total: | 1127 |
| Population Density Km2: | 138.06 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Postal Code Type: | ZIP codes |
| Blank Name: | FIPS code |
| Blank Info: | 42-26960 |
| Blank1 Name: | GNIS feature ID |
| Area Total Sq Mi: | 3.17 |
| Area Land Sq Mi: | 3.15 |
| Area Water Sq Mi: | 0.02 |
| Population Density Sq Mi: | 357.55 |
Foster Brook is a census-designated place[3] in Foster Township, McKean County in the state of Pennsylvania, United States. The community is just north of Bradford, along Pennsylvania Route 346. As of the 2022 American Community Survey, Foster Brook was estimated to have 1,069 residents.[4]