Just for comparison's sake... here's some population densities of similar-sized cities (in terms of population), and their city area (just the city; not any metro areas and densities):
Area:
1. Ottawa: 2,778.64 kmē
2. Jacksonville: 2,264.5 kmē
3. Phoenix: 1,334.1 kmē
4. San Antonio: 1,067.3 kmē
5. Dallas: 997.1 kmē
6. San Diego: 963.6 kmē
7. Calgary: 726.50 kmē
8. Edmonton: 684.37 kmē
9. San Jose: 461.5 kmē
10. Detroit: 370.2 kmē
Population Density:
1. Detroit: 2,647/kmē
2. San Jose: 2,014.4/kmē
3. San Diego: 1,494.7/kmē
4. Dallas: 1,391.9/kmē
5. Calgary: 1,360.2/kmē
6. Phoenix: 1,188.4/kmē
7. Edmonton: 1,099.4/kmē
8. San Antonio: 1,084.4/kmē
9. Jacksonville: 409.89/kmē
10. Ottawa: 219.8/kmē
Keep in mind, the only thing similar about these cities are their populations.
First off, completely disregard Ottawa, as it is the capital city of Canada and due to the sheer number of federal and government buildings, it understandably is a large area in size; however, it is the exception and not the rule.
Other than that, it appears that Calgary is middle of the pack when it comes to area and density; metro area and desnity, however, may be another story.