Fall 1980 on-campus enrollment data for public and private colleges and universities in Arkansas and comparative data for previous years are presented, along with a narrative description of the data. Information is presented on the following: fall on-campus headcount enrollment trends, on-campus headcount and average course load by student level and by current legal residence, headcount enrollment of first-time students, full-time equivalent enrollment by course level, and environmental characteristics that may affect future enrollment. Among the findings are the following: the total headcount enrollment for 1980 increased 4 percent over 1979; the two-year private colleges were the only group with a decline in enrollment between 1979 and 1980; and The University of Arkansas, Little Rock, and Southern Arkansas University, El Dorado, and the community colleges have approximately half of their enrollment in part-time students, while all other institutions have significantly higher numbers of full-time students enrolled. Environmental factors that may affect future enrollments include a decline in the traditional-aged college student, higher percentages of female and minority students, greater percentage increases in enrollments in two-year colleges, and increasing college costs and decreasing financial aid. (SW)