| County : | Polk County |
| State : | Minnesota (MN) |
| Land Area : | 1,971.12 sq mi |
| Water Area : | 26.66 sq mi |
| Latitude : | 47.7742536 |
| Longitude : | -96.4000266 |
| Population (2010): | 31,600 |
| Population Estimate (2012) : | 31,426 |
| Population Density : | 16.03/sq mi |
| Housing Units (2012) : | 14,610 |
| Median Household Income (2012) : | $49,859 (Minnesota : $59,126, USA : $53,046) |
| Median Family Income (2012) : | $65,357 (Minnesota : $74,032, USA : $64,585) |
| Median House Price (2012) : | $123,200 (Minnesota : $194,300, USA : $181,400) |
Polk County Cities / Towns
| Beltrami City (107) | Climax City (267) | Crookston City (7,891) |
| East Grand Forks City (8,601) | Erskine City (503) | Fertile City (842) |
| Fisher City (435) | Fosston City (1,527) | Gully City (66) |
| Lengby City (86) | Mcintosh City (625) | Mentor City (153) |
| Nielsville City (90) | Trail City (46) | Winger City (220) |
Polk County Zip Codes
| 56517 (279) | 56523 (539) | 56535 (1,363) |
| 56540 (1,962) | 56542 (2,829) | 56556 (1,160) |
| 56568 (142) | 56592 (516) | 56621 (4,639) |
| 56634 (1,639) | 56644 (787) | 56646 (355) |
| 56651 (538) | 56684 (282) | 56710 (490) |
| 56715 (350) | 56716 (9,416) | 56721 (10,096) |
| 56722 (386) | 56723 (970) | 56736 (903) |
| 56742 (918) | 56744 (621) | 56750 (2,539) |
| 56762 (2,494) |