What kind of tree did Zacchaeus climb to see Jesus?

Answer: A sycamore

Being small in stature, Zacchaeus ran ahead and climbed a sycamore tree to see Jesus pass by.

“He was trying to see who Jesus was, but could not see over the crowd because he was small in stature. So he ran on ahead and climbed a sycamore tree to see Him, since Jesus was about to pass that way.”— Luke 19:3-4 (BSB)