2. Average and Median Income per Household Member. The chart above displays average and median household income adjusted for household size. Both the average and median income per person in the US reached all-time highs in 2017 of nearly $34,000 (in 2017 dollars) for average income per person, and $24,160 for median income per household member last year. Compared to 1975, the average household income per US household member has increased by 74% from $19,500 to $34,000, while the median household income per person has increased by 45% from $16,600 to $24,160. Without adjusting for household size, average household income increased by only 50% since 1975 (vs. 74% adjusted for average household size) and median income increased only 25% (vs. 45%), demonstrating the importance of adjusting for changes in household size when comparing median household incomes over time.