- Census Tracks (Video)
Explains census tracts. They are small, relatively permanent statistical subdivisions of a county. – Uniquely numbered in each county with a numeric code • Census tracts average about 4,000 inhabitants – Minimum Population – 1,200 – Maximum Population – 8,000
- Census Blocks
Statistical areas bounded by visible features such as roads, streams, and railroad tracks, & by nonvisible boundaries such as property lines, city, township, school district, county limits & short line-of-sight extensions of roads.
- Census Tract History
Power Point explains tracts
- Census Block & Block Groups History
History of tract/block numbering from the Geographic Areas Reference Manual (GARM).
- Census Tract/Block Numbering History
Brief history of tract/block numbering.