Introduction: Functional dyspepsia includes chronic and recurrent disorders of the upper digestive tract and which have no organic origin. Objectives: The objectives of this study were to determine factors associated with functional dyspepsia among the workers of fast food establishments at a mall in Huancayo, Perú. Methodology: This is an analytical cross-sectional study of 128 fast food workers in a city in the Peruvian highlands. “A new questionnaire for the diagnosis of dyspepsia” was used to diagnose functional dyspepsia and record social variables, consumption and eating habits. From this information statistical measures of association were obtained. Results: Forty percent of those surveyed had functional dyspepsia. There was a lower frequency of functional dyspepsia among women than men (Prevalence ratio: 0.64, 95% CI: 0.41-0.99, p-value = 0.044). Those who had difficulty falling asleep and/or suffered from nighttime awakening (Prevalence ratio: 1.89, 95% CI: 1.37-2.61, p value <0.001) and those who drank alcohol regularly (Prevalence ratio: 3.28, 95% CI: 1, 02-10.6, p value = 0.047) had a higher frequency of functional dyspepsia. This was adjusted by five variables. According to eating habits, it was found that a higher frequency of dyspepsia was associated with skipping lunch (Prevalence ratio: 1.88, 95% CI: 1.22-2.90, p-value = 0.004), skipping dinner (Prevalence ratio: 3.44, 95% CI: 2.72-4.35, p value <0.001) and eating regularly in other restaurants (Prevalence ratio: 1.87, 95% CI: 1.22-2.88; p = 0.004). This was adjusted by three variables. Conclusions: We found some characteristics associated with functional dyspepsia in this population shares characteristics with similar populations which could be useful for developing strategies for detection and timely diagnosis.