Excitation functions and angular distributions of the $\ensuremath{\gamma}$ radiation from $^{89}\mathrm{Zr}$ following the reaction $^{89}\mathrm{Y}(p, n)$ have been measured with a 56-${\mathrm{cm}}^{3}$ Ge(Li) detector in the range from 5.4- to 7.8-MeV bombarding energy. At 6.00-, 6.16-, 7.28-, and 7.45-MeV bombarding energy, resonances in several neutron channels were observed which were attributed to isobaric analog states in the compound system $^{90}\mathrm{Zr}$. From an analysis of the 6.16-MeV ${1}^{\ensuremath{-}}$ resonance in terms of Robson's theory, the level shift $\ensuremath{\Delta}=86$ keV was obtained which was compared with an estimate derived from the spreading width of this resonance. New states in $^{89}\mathrm{Zr}$ were identified at 1834-, 2081-, 2130-, 2220-, 2298-, 2389-, 2570-, and 2610-keV excitation energy. From a Hauser-Feshbach analysis of the $\ensuremath{\gamma}$-ray excitation functions and angular distributions, the spins of a number of these states and mixing ratios of $\ensuremath{\gamma}$-ray transitions were found. Evidence is given for a weak coupling multiplet of a ${g}_{\frac{9}{2}}$ neutron hole coupled to the 2.18-MeV ${2}^{+}$ state in $^{90}\mathrm{Zr}$.