Median Fourplex Cost: $485,000

Population: 2,304,580

Median Fourplex Cost: $449,000

Population: 1,434,625

Median Fourplex Cost: $750,000

Population: 1,304,379

Median Fourplex Cost: $630,000

Population: 961,855

Median Fourplex Cost: $404,499.5

Population: 918,915

Median Fourplex Cost: $325,000

Population: 678,815

Median Fourplex Cost: $349,000

Population: 394,266

Median Fourplex Cost: $299,900

Population: 317,863

Median Fourplex Cost: $575,000

Population: 285,494

Median Fourplex Cost: $290,000

Population: 257,141

Median Fourplex Cost: $410,000

Population: 256,684

Median Fourplex Cost: $385,500

Population: 255,205

Median Fourplex Cost: $1,450,000

Population: 246,018