The perspectives of parents of private middle school students regarding the use of school-located immunization programs (SLIPs) are unknown. Parents of private middle school students in a large, urban setting were surveyed "N" = 1,210) regarding their willingness to use SLIPs. Analyses included frequencies and chi-square analyses. Data from prior work with public school parents were included for comparison. Of the 1,210 questionnaires, 219 were returned; only 19% of respondents reported they were willing to use a SLIP, compared to 41% of public middle school parents. However, 54% of private school parents were willing to consider using SLIPs for influenza vaccine, and 6% would use SLIPs for human papillomavirus vaccine. Hispanic (Mexican) ethnicity ("p" = 0.014) was associated with greater willingness to utilize SLIPs. Private middle school parents, in this sample, are relatively unwilling to utilize SLIPs compared to public school parents. These data should be considered when implementing SLIPs in the future. (Contains 3 tables.)