How many police departments do you have in your area?

13 Dec, 2006 General

I think the first thing I should mention here is that I live in Harris County, which surrounds Houston, TX and beyond. With that said, I was wondering if we had the most amount of police coverage in the state or even the country. The following are the police patrol cars that can be seen on the average commute around Houston:

Houston Police
Metro Police
Harris County Sheriff
Harris County Precinct Constable
Texas State Trooper (Department of Public Safety)

Obviously they all have overlapping jurisdictions, but I thought it was odd that we can pass this many different officers on a single trip into town. Is that normal for larger cities or counties? That is my random thought of the day.