This atlas is designed to facilitate planning for health services for migrant and seasonal farmworkers (MSFWs) and for evaluating the extent to which existing programs are reaching the target population. The document estimates how many MSFWs are present in counties of each state, and shows where they work or reside. Chapter 1 introduces the reader to the document and defines the population. Summary profile tables in Chapter 2 provide the estimated aggregate MSFW population, including non-working family members, for the 41 states, including Puerto Rico, that submitted a profile. Chapter 3 provides individual state profiles. Maps display: (1) the distribution of the MSFW population for each state; (2) the locations of major crop areas and seasons; (3) the locations of migrant health centers; and (4) the locations of selected community health centers. Each state section describes adjustments to the profile that were necessary due to differences in methodologies used for developing profiles. Chapter 4 contains names and addresses for sources of information concerning the state profiles. Appendices are provided for: (1) historical estimates and comparative utilization data; (2) profile review issues; and (3) the request for proposal used to solicit bids for the preparation of state profiles. (KS)