Parity measurements in $^{80}$Sr

High-spin states in $^{80}$Sr were studied using the $^{54}$Fe($^{28}$Si,2$p$) reaction at 90 MeV and the $^{58}$Ni($^{28}$Si,$\alpha$2$p$) reaction at 110 MeV using the Tandem--Superconducting LINAC accelerator at Florida State University (FSU). Prompt $\gamma-\gamma$ coincidences were measured in the first reaction using the FSU array of ten Compton-suppressed Ge detectors. $\gamma$-ray linear polarizations were measured in both reactions using three Clover detectors as Compton polarimeters. As a result of these measurements, the parities of three non-yrast band structures have been determined, confirming the interpretations of the most recent in-beam and $\beta$-decay studies. In particular, the most strongly populated non-yrast band has been assigned negative parity, in agreement with most other neighboring even-even nuclei. Another high-spin sequence, with a parity assignment left open by the most recent in-beam study, has been tentatively assigned negative parity.