Oregon. Between 1857 and 2002 Oregon's state constitution contained a clause banning blacks from even owning property within its borders.
Try 1926. And yet there were some African Americans living in Oregon during this period. The exclusionary clause reflected measures in other states, North and South, which limited the rights of Blacks. It's worth noting, though, that the strongest supporters of the exclusionary clause also wanted slavery in Oregon and would have made Oregon a slave state if they had their way. After the 14th Amendment the clause was a dead letter.