We characterize the local Li structure in the low-temperature phase of LixC60 with 6 less than or equal tox less than or equal to 15 using single and multiple-quantum Li-7 nuclear magnetic resonance spectroscopy. We find clear evidence for Li cluster intercalated structures in all compositions. The inferred cluster sizes are significantly smaller than those suggested by the stoichiometry and could be explained by a more disordered LixC60 low-temperature phase than expected from the current models.