, ▁but ▁with ▁the ▁name ▁of ▁Y uma . ▁On ▁October ▁ 2 8 , ▁ 1 8 6 9 , ▁it ▁was ▁renamed ▁Arizona ▁City . ▁ ▁By ▁ 1 8 7 0 ▁the ▁population ▁of ▁Arizona ▁City ▁had ▁ris en ▁to ▁ 1 , 1 4 4 . ▁ ▁In ▁ 1 8 7 1 , ▁it ▁became ▁the ▁county ▁seat ▁of ▁Y uma ▁County ▁replacing ▁La ▁Paz . ▁ ▁Finally ▁both ▁the ▁post ▁office ▁and ▁city ▁took ▁the ▁name ▁Y uma ▁on ▁April ▁ 1 4 , ▁ 1 8 7 3 . ▁ ▁Dem ograph ics ▁ ▁Arizona ▁City ▁first ▁appeared ▁on ▁the ▁ 1 8 6 0 ▁U . S . ▁Census ▁in ▁what ▁was ▁then ▁Arizona ▁County , ▁New ▁Mexico ▁Territ ory ▁( which ▁en comp ass ed ▁virt ually ▁the ▁entire ty ▁of ▁the ▁soon - to - be ▁new ▁Arizona ▁Territ ory ). ▁It ▁was ▁err one ously ▁reported ▁as ▁the ▁village ▁of ▁" A riz onia " ▁and ▁featured ▁ 1 3 0 ▁residents . ▁The ▁cum ulative ▁total ▁err one ously ▁showed ▁ 1 2 8 ▁White ▁residents , ▁ 1 ▁Black ▁and ▁ 1 ▁Native ▁American . ▁The ▁trans cribed ▁roll s ▁noted ▁ 1 2 7 ▁Wh ites ▁and ▁one ▁Asian , ▁a ▁ 2 6 - year ▁old ▁Chinese ▁cook ▁named ▁William ▁T . ▁Ch ing , ▁accident ally ▁counted ▁as ▁White . ▁At ▁the ▁time , ▁it ▁was ▁the ▁ 5 th ▁largest ▁White ▁settlement ▁( and ▁ 1