The cost of living in the U.S. in 2025 varies significantly by state and city, with California and Hawaii frequently named as the most expensive states due to high housing and other costs. Conversely, states like West Virginia, Mississippi, and Oklahoma are among the most affordable. The national average cost of bills is approximately \(\$1,149\) per month, though this is heavily influenced by regional differences in essential costs like housing, groceries, and utilities.