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Oliver County, ND (shown in white) has 722.4 mi² of land area and 8.68 mi² of water resources. The county is bordered by:
The county's elevations range from a low of 1,624' to a high of 2,414.7', with a weighted average of 2,041.2' above sea level.
Temperatures range from average lows around 2.3°F to average highs around 83.8°F. A year-round daily temperature averages 41.8°F. Average annual precipation is 18.6". With these temperatures and precipation, the majority of the county scores as an 4A using the USDA Plant Hardiness Zone Map (the standard by which gardeners and growers can determine which perennial plants are most likely to thrive in a location).
The estimated population of Oliver County is 1,876 with 760 households. These households are spread across single municipalty.