Arizona State Route 238

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State Route 238, also known as SR-238, is an east-west state highway in central Arizona.

While the mile markers indicate a start in Gila Bend, the highway is not actually part of the State Highway System until it reaches the Maricopa/Pinal County line about halfway to Maricopa. This stretch of road is known as Maricopa Road (except for a brief portion signed as Smith Enke Road within the town of Maricopa) and serves as a direct route between the two towns as well as an access road for the Sonoran Desert National Monument; until recently this was unpaved, and had been upgraded to serve a proposed hazardous waste management facility. The official State Highway maps show this road terminating at Maricopa at the junction with State Route 347.

Some road maps show a continuation of the route eastbound; after briefly duplexing with a short southbound stretch of State Route 347 (also, confusingly, known as Maricopa Road or the John Wayne Parkway), the highway beelines southeast to its eastern terminus at Casa Grande; this stretch of the highway is known as the Maricopa-Casa Grande Highway. According to ADOT, this section of road is not currently commissioned [1].

Virtually the entire road follows the Southern Pacific Railroad line, with brief detours at the Maricopa and Casa Grande townsites.