Alton, Texas

Alton population, 2020 to 2024

Alton added 4,541 residents from July 2020 to July 2024, a change of +24.7%. In the latest year it moved by +1,699. Among 384 Texas places of 5,000 or more, that growth ranks 58th; the median place changed by +4.5%. The median place of 5,000+ in Texas has 15,345 people, so Alton is 1.5 times that size.

Alton covers 7.60 square miles of land, for 3,014 people per square mile of land. The median Texas place of 5,000+ has 1,561, so Alton is denser than the typical town.

What county Alton is in

All of Alton's residents live in Hidalgo County, which had 914,820 residents in 2024. Alton holds 2.5% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Alton

1 ZIP Code Tabulation Area (ZCTA) overlaps Alton by at least 10% of the ZCTA's or the city's land: 78573. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where Alton is

The Census internal point of Alton is at 26.288800, -98.310600. Austin, the capital, is 277.5 miles N in a straight line. The nearest larger place is Mission, TX (88,574 people), 5.9 miles away. The nearest city of 100,000 or more is McAllen, TX, 6.0 miles away.

Daylight in Alton

At 26.29° N, Alton gets about 13 h 47 min of daylight around the June solstice and 10 h 30 min around the December solstice, a swing of 3 h 18 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Alton

The eight nearest incorporated places of 1,000+ in Texas, measured between internal points. The closest is Palmhurst, 2.3 miles away, with 2,602 people.