The sheriff and some other regional officials with specific duties are still elected locally to perform duties within the county region, but there is no county council or commissioner. However, communities are now granted the right to form their own regional compacts for sharing services. As of the census of 2004, there were 461,228 people, 175,288 households, and 115,690 families residing in the county. The population density was 285/km (738/mi).

There were 185,876 housing units at an average density of 116/km (301/mi). The racial makeup of the county was 79.10% White, 8.10% Black or African American, 0.26% Native American, 1.30% Asian, 0.07% Pacific Islander, 8.85% from other races, and 2.32% from two or more races. 15.17% of the population were Hispanic or Latino of any race.

The median income for a household in the county was $39,718, and the median income for a family was $49,257. Males had a median income of $37,676 versus $27,621 for females. The per capita income for the county was $19,541. About 11.40% of families and 14.70% of the population were below the poverty line, including 22.70% of those under age 18 and 9.60% of those age 65 or over.