Energy levels of singly ionized and neutral zirconium

•We are submitting a manuscript titled “Energy Levels of Singly Ionized and Neutral Zirconium”. It reports improved energy levels from FTS measurements for 36 levels of singly ionized Zr and 87 levels of neutral Zr.•The design and construction of extremely large telescopes with primary mirror diameters in the 30 m to 50 m range increases the need for better energy levels than available in the NIST ASD for separating blends and for measuring isotopic abundance patterns.