ComScore has announced some information on the demographics of iPhone users. The report says that 43% of iPhone users make over $100,000 annually, the strongest growth in users is from people earning under the median household income.

iPhone adaption has risen 48% since June 2008 among those earning between $25,000 and $50,000, three times the growth rate of those earning more than $100,000 per year. Growth in the same period from users making under $25,000 per year is 16%. ComScore thinks the growth in relatively low-income users is due to the consolidation of multiple devices like computers and home phones into one iPhone.

"As an additional household budget item, a $200 device plus at least $70 per month for phone service seems a bit extravagant for those with lower disposable income," said Jen Wu, senior analyst, comScore, the report's author. "However, one actually realizes cost savings when the device is used in lieu of multiple digital devices and services, transforming the iPhone from a luxury item to a practical communication and entertainment tool."

Via ComScore