Welcome to the City of Alto! We are a small town established in 1849 near the Caddo Mounds State Historic Site. On this website, you can find information about the city including city government and utility information. Warning: DO NOT USE doxo.com to pay a City of Alto utility bill. If doxo.com is used and payment is received late, late fees will be applied. Also, if the bill is not paid by the 25th of the month, the account will be disconnected! Only use our site to pay bills online.