Families search for the average IQ of Ivy League students because admission to elite schools is so often treated as proof of raw intelligence. These universities do not test IQ at any point, but widely cited estimates place the typical score between 125 and 135.
That range reflects selective admissions, academic filtering during high school, and sustained performance over four years. It does not come from intelligence tests administered by the schools themselves. Estimates are inferred from standardized testing, academic outcomes, and population models of human intelligence.