This bit of data was re-posted from Parade magazine on the GRG mailing list today. The numbers are of course projected to grow.
How many people in this country are 100 or older?
At the time of the last census, in the year 2000, the U.S. had about 50,000 centenarians. The largest number (5341) lived in California, followed by 3997 in New York. Perhaps more revealing, the two states with the highest proportion of their populations 100 years or older were South Dakota (one out of every 3056 people) and Iowa (one out of every 3110 people).
CA & NY lead in Centenarian numbers