The 1948 United States presidential election in Arizona took place on November 2, 1948, as part of the 1948 United States presidential election. State voters chose four representatives, or electors, to the Electoral College, who voted for president and vice president.

Arizona was won by incumbent President Harry S. Truman (D–Missouri), running with Senator Alben W. Barkley, with 53.79% of the popular vote, against Governor Thomas Dewey (R–New York), running with Governor Earl Warren, with 43.82% of the popular vote.

, this is the last election in which Yavapai County voted for a Democratic presidential candidate.Sullivan, Robert David; ‘How the Red and Blue Map Evolved Over the Past Century’; America Magazine in The National Catholic Review; June 29, 2016 Maricopa County would not vote Democratic again until 2020. Coconino County would not vote Democratic again until 1992, Navajo County not until 1976, while Apache, Cochise, Mohave and Pima Counties would next vote Democratic for Lyndon Johnson in 1964.Menendez, Albert J.; The Geography of Presidential Elections in the United States, 1868–2004, p. 148

Nonetheless, Dewey remains the last Republican presidential candidate to never receive Electoral Votes from Arizona. Bob Dole received Electoral Votes from the state during his unsuccessful bid for Vice President in 1976, but lost the state in 1996. Donald Trump would win the state in 2016, and later in 2024.

This is also the last election where a candidate carried every county in the state and the last time a Democrat won the state with an outright majority. It is also the last time Arizona voted more Democratic than the nation as a whole.

Arizona would vote Republican in every election thereafter except 1996 and 2020. Arizona has never backed a Democratic nominee who lost the presidential election.

Results

Results by county CountyHarry S. TrumanDemocraticThomas E. DeweyRepublicanHenry A. WallaceProgressiveClaude A. WatsonProhibitionEdward A. TeichertSocialist LaborMarginTotal votes cast#%#%#%#%#%#% Apache 1,480 60.29% 970 39.51% 5 0.20% 0 0.00% 0 0.00% 510 20.78% 2,455 Cochise 6,198 59.77% 3,854 37.16% 284 2.74% 29 0.28% 5 0.05% 2,344 22.61% 10,370 Coconino 2,309 51.99% 2,093 47.13% 26 0.59% 11 0.25% 2 0.05% 216 4.86% 4,441 Gila 4,780 65.79% 2,329 32.06% 120 1.65% 31 0.43% 5 0.07% 2,451 33.73% 7,265 Graham 2,139 63.17% 1,209 35.71% 31 0.92% 6 0.18% 1 0.03% 930 27.46% 3,386 Greenlee 2,069 69.88% 680 22.97% 202 6.82% 8 0.27% 2 0.07% 1,389 46.91% 2,961 Maricopa 40,498 51.27% 36,585 46.31% 1,403 1.78% 459 0.58% 47 0.06% 3,913 4.96% 78,992 Mohave 1,499 55.27% 1,167 43.03% 32 1.18% 8 0.29% 6 0.22% 332 12.24% 2,712 Navajo 2,669 58.45% 1,841 40.32% 45 0.99% 8 0.18% 3 0.07% 828 18.13% 4,566 Pima 17,692 49.66% 16,968 47.63% 807 2.27% 120 0.34% 38 0.11% 724 2.03% 35,625 Pinal 3,572 60.68% 2,232 37.91% 61 1.04% 20 0.34% 2 0.03% 1,340 22.77% 5,887 Santa Cruz 1,424 56.53% 1,058 42.00% 26 1.03% 10 0.40% 1 0.04% 366 14.53% 2,519 Yavapai 4,439 49.75% 4,287 48.05% 132 1.48% 60 0.67% 4 0.04% 152 1.70% 8,922Yuma 4,483 64.37% 2,324 33.37% 141 2.02% 11 0.16% 5 0.07% 2,159 31.00% 6,964Totals95,25153.79%77,59743.82%3,3101.87%7860.44%1210.07%17,6549.97%177,065

Electors Electors were chosen by their party's voters in primary elections held on September 7, 1948. Harry S. Truman & Alben W. BarkleyDemocratic Party Thomas E. Dewey & Earl WarrenRepublican Party Henry A. Wallace & Glen H. TaylorProgressive Party Claude A. Watson & Dale LearnProhibition Party Edward A. Teichert & Stephen EmerySocialist Labor Party

See also United States presidential elections in Arizona

References