For patients with severe or persistent problems, medications and referrals to sleep specialists may be warranted, the editors said.
The MMWR editors also suggested that the geographic variation may be related to occupational factors, such as the prevalence of rotating and/or extended shifts, and to other factors such as depression and obesity, which can also affect sleep.
Women were slightly more likely than men to report never getting enough sleep (12.4 percent versus 9.9 percent).
Seniors 65 and older were most satisfied with their sleep, with 57 percent saying they got enough every day and just 7 percent reporting insufficient sleep every day.
Respondents in the 25-34 age group reported the worst sleep. Twenty-two percent of the young adults reported 30 days of good sleep and 14 percent reported 30 days of poor sleep.
Limitations of the report included the fact that the survey relied on respondents' subjective interpretations of "enough sleep and rest," meaning that the results can't be compared directly with studies of objective sleep duration.
Also, the survey was conducted by telephone, and therefore excluded some important populations, including those in institutional residences and those without landline phones.