Arizona is well on its way to adding another town - San Tan Valley

Yesterday, San Tan Valley, an unincorporated area in northern Pinal County (but in the Phoenix metro area) voted on incorporation.

The results are still unofficial, but the ballot question appears to have passed resoundingly.

From Pinal County Elections -

There are 18 precincts in San Tan Valley; 16 have reported and two have not (as of this writing), but I'm guessing that there aren't enough voters in those two precincts to overcome the current 2-1 margin in favor.

According to Google, San Tan Valley has approximately 100K people in it -

While incorporation would probably make it the largest "town" in Pinal County but not the largest town in AZ.

Gilbert, with slightly under 300K folks, has that title.  There are political costs and benefits to designations of "town" or "city."

And Gilbert has decided to remain a town.