Neurons in posterior parietal cortex (PPC) encode many aspects of the sensory world (e.g., scene structure), the posture of the body, and plans for action. For a downstream computation, however, only some of these dimensions are relevant; the rest are “nuisance variables”, because their influence on neural activity changes with sensory and behavioral context, potentially corrupting the read-out of relevant information. Here we show that a key postural variable for vision – eye position – is represented robustly in male macaque PPC across a range of contexts, even though the tuning of single neurons depended strongly on context. Contexts were defined by different stages of a visually guided reaching task, including ( i ) a visually sparse epoch; ( ii ) a visually rich epoch; ( iii ) a “go” epoch in which the reach was cued; and ( iv ) during the reach itself. Eye position was constant within trials but varied across trials in a 3 × 3 grid spanning 24° × 24°. Using demixed principal component analysis of neu...