David Dockery stated, "Most churches are found in rural areas while most people live in urban and suburban areas" (see session 12 of the "Southern Baptists, Evangelicals, and teh future of Denominationalism" conference). I have obvserved this statement to be true quite often, though there are exceptions.
The national average in America is that there is one house of worship (church, synogogue, mosque, cult, etc.) for every 1,000 people. But for some reason, churches tend to be more densly clustered in places where the population is quite sparce. For example, I have two friends who pastor churches in northern Minnisota in a town of about 800 people. There are 6 churches in that community- or one church for every 133 people. On the other hand, I live in Old Bridge, NJ. Our township website lists 21 houses of worship (and I could only recommend about 1/3 of them as Christian). But there are over 60,000 people in the township of Old Bridge. That means that we have one church for every 3,000 people. Stated differently, there are 20 times more churches per person in a rural community in MN than there are in a suburban community of NJ.
Before coming home to NJ, I lived in Chambersburg, Pennsylvania. Chambersburg is the county seat of Franklin county. Franklin county is a rural area. It has over 400 churches serving about 129,000 people. This means that there is one church in Franklin county for every 325 people in that county. This county has approximately three times more churches per person than the national average.
You may be wondering why we should care where the churches in America are as long as we have plenty of good ones. But the sad fact is that there are heavily populated sections of our country that do not have as significant of a gospel witness as they should have. Many people recognize the need for more churches to be started. I would encourage us to be strategic in seeking to start more churches in areas that are "under-churched." I trust that more God will raise up more churches in central NJ and other parts of this country so that He will be glorified as He draws more people in these communitites to Himself.