The 2014-2018 data come from the U.S. Census Bureau's American Community Survey. They are based on averages of data collected in 2014, 2015, 2016, 2017, and 2018. These estimates cannot be used to say what is going on in any particular year in the period, only what the average value is over the full period. The Census Bureau's data.census.gov also provides 1-year estimates for counties with at least 65,000 people. We use 5-year estimates because they are available for all counties and allow comparison to other counties within the region.
The Census Bureau defines a housing unit as a house, an apartment, a mobile home or trailer, a group of rooms, or a single room occupied as separate living quarters (or if vacant, intended as separate living quarters). Housing units are classified as being occupied – either by owners or renters – or vacant.
In Madison . . .
- the total number of housing units was 11,280 in 2010;
- the number of housing units increased by 10.8 percent from 1980 to 1990; increased by 24.4 percent from 1990 to 2000; and increased by 47.8 percent from 2000 to 2010;
- in 2014-2018, 35.7 percent of all housing units were owner occupied, 41.3 percent were occupied by renters, and 22.9 percent were vacant.