Articles and Updates
Arizona’s 2010 Census Counts Fall Shy of Expectations
March 16, 2011
U.S. Census Bureau estimates of Arizona’s population predicted that the Census enumeration would find 6,654,358 residents. The actual count was 6,392,017, or over a quarter million shy. The 4.1% miss was the largest “under-count” of any state.
Maricopa and Pima Counties account for nearly all the shortfall. Maricopa County’s 3.8 million count is 235,704 short of expectations. In Pima County, the count is 45,023 lower than expected, putting the resident population just below 1 million (980,263). Surprisingly, nearly 12,000 more people were counted in Pinal County than estimated with more than 375,000 residents.
Comparison of Preliminary Population Estimates and 2010 Census Counts for Arizona
| April 1, 2010 | ||||
| Census | Estimate | Difference | ||
| Number | Percent | |||
| Arizona | 6,392,017 | 6,654,358 | (262,341) | -4.1% |
| Apache | 71,518 | 71,100 | 418 | 0.6% |
| Cochise | 131,346 | 129,860 | 1,486 | 1.1% |
| Coconino | 134,421 | 130,712 | 3,709 | 2.8% |
| Gila | 53,597 | 52,242 | 1,355 | 2.5% |
| Graham | 37,220 | 36,702 | 518 | 1.4% |
| Greenlee | 8,437 | 7,801 | 636 | 7.5% |
| La Paz | 20,489 | 19,800 | 689 | 3.4% |
| Maricopa | 3,817,117 | 4,052,821 | (235,704) | -6.2% |
| Mohave | 200,186 | 194,297 | 5,889 | 2.9% |
| Navajo | 107,449 | 113,244 | (5,795) | -5.4% |
| Pima | 980,263 | 1,025,286 | (45,023) | -4.6% |
| Pinal | 375,770 | 363,881 | 11,889 | 3.2% |
| Santa Cruz | 47,420 | 43,676 | 3,744 | 7.9% |
| Yavapai | 211,033 | 215,070 | (4,037) | -1.9% |
| Yuma | 195,751 | 197,866 | (2,115) | -1.1% |
Source: U.S. Census Bureau
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