The average starting wage in the US is roughly 20,000$ a year. The median income for a US family is around $40, 500. It is not that low compared to other nations, but the economy has made it lower.
It is highly depend on career path, and can be anything between 10,000$ to even 100,000$ annually. But I would say average is around 30,000$ annually before taxes for collage educated professional.