1st President of Mexico
Oct 10 Guadalupe Victoria takes office as the first (interim) President of the United Mexican States
- Oct 21 Joseph Aspdin patents Portland cement (Yorkshire, England)
Jackson vs Adams
Oct 26 First presidential election in American history where the popular vote is important with 18 states choosing presidential electors by popular vote. Andrew Jackson wins the most votes but is short of a majority, forcing a contingent election in the House of Representatives which John Quincy Adams wins.