AbstractThe integration of visual and auditory spatial information is important for building an accurate perception of the external world, but the fundamental mechanisms governing such audiovisual interaction have only partially been resolved. The earliest interface between auditory and visual processing pathways is in the midbrain, where the superior (SC) and inferior colliculi (IC) are reciprocally connected in an audiovisual loop. Here, we investigate the mechanisms of audiovisual interaction in the midbrain by recording neural signals from theSCandICsimultaneously in anesthetized ferrets. Visual stimuli reliably produced band‐limited phase locking ofIClocal field potentials (LFPs) in two distinct frequency bands: 6–10 and 15–30 Hz. These visualLFPresponses co‐localized with robust auditory responses that were characteristic of theIC. Imaginary coherence analysis confirmed that visual responses in theICwere not volume‐conducted signals from the neighboringSC. Visual responses in theICoccurred later than retinally driven superficialSClayers and earlier than deepSClayers that receive indirect visual inputs, suggesting that retinal inputs do not drive visually evoked responses in theIC. In addition,SCandICrecording sites with overlapping visual spatial receptive fields displayed stronger functional connectivity than sites with separate receptive fields, indicating that visual spatial maps are aligned across both midbrain structures. Reciprocal coupling between theICandSCtherefore probably serves the dynamic integration of visual and auditory representations of space.