Progress in delivering high-speed internet to the U.S.
Tracked in this paper by the FCC.
Check out the graphics: Chart 12, and the map on page 23. Note that most areas have more than one competitor.
"High Speed" is defined at 200Kbps in at least one direction.
Important note: This is available bandwidth, not a measurement of how many people actually have it in those areas, or even want it. A service company is considered available in an area if it has at least one subscriber in that Zip code.