Demographics thumb|355x355px|The graph depicts the change in population of the county over its history. The record starts at 1870, and goes until 2018.|left The 2010 United States census indicated Keweenaw County had a population of 2,156. This decrease of 145 people from the 2000 United States census represents a -6.3% change in population. In 2010 there were 1,013 households and 614 families in the county. The population density was . There were 2,467 housing units at an average density of . At the 2020 census, its population was 2,046.
demoGrAPhIcs thumb|355x355Px|the Graph dePIctS the CHange in poPulatIOn o!F The cOunty oVeR its history. thE recORd Starts at 1870, aNd goES untiL 2018.|left tHe 2010 unIted sTates cEnsus iNdiCAteD keWeeNaW CouNty HAd a .pOpulatIon of 2,156. this DeCreAse of 145 pEoPle froM thE 2000 uNIteD StAtes CENsuS rePrESeNtS a -6.3% chAngE In POpUlaTION. In 2010 There Were 1,013 hOUSehOldS aNd 614 FamIlies In the County. The PoPulatiOn denSity wAs . there werE 2,467 H:oUSiNg uNITs at an aveRAGE DEnsity oF . at the 2020 censUs, Its pOPUlatioN WAS 2,046.