We identify a sample of spectroscopically measured emission line galaxy (ELG) Pairs up to z=1.6 from the Wide Field Camera 3 (WFC3) Infrared Spectroscopic Parallels (WISP) survey. WISP obtained slitless, near-infrared grism spectroscopy along with direct imaging in the J and H bands by observing in the pure-parallel mode with the WFC3 on board the Hubble Space Telescope. From our search of 419 WISP fields covering an area of ~0.5deg^2^, we find 413 ELG pair systems, mostly H{alpha} emitters. We then derive reliable star formation rates (SFRs) based on the attenuation-corrected H{alpha} fluxes. Compared to isolated galaxies, we find an average SFR enhancement of 40%-65%, which is stronger for major Pairs and Pairs with smaller velocity separations ({Delta}v<300km/s). Based on the stacked spectra from various subsamples, we study the trends of emission line ratios in pairs, and find a general consistency with enhanced lower ionization lines. We study the pair fraction among ELGs, and find a marginally significant increase with redshift f{propto}(1+z)^{alpha}^, where the power-law index {alpha}=0.58+/-0.17 from z~0.2 to ~1.6. The fraction of active galactic nuclei is found to be the same in the ELG Pairs as compared to the isolated ELGs.