First-order leveling surveyed in 1951 and 1994 along a line across the Alban Hills volcano reveals maximum vertical uplift of 30 cm (average of 7 mm/yr) in the region of geologically recent (0.020--0.030 Ma) explosive activity. The uplifted region corresponds to an area where seismic activity is concentrated, at depths of 3--6 km. Uplift exceeding 10 cm is observed over a 14-km wide zone in the center of a 40-km long line, with the deformation tapering to zero at both ends of the line. Data from a few sparse, older benchmarks measured in 1891 and 1927 suggest that the deformation in the first half of this century was very small compared to the period 1951--1994. The observed uplift, together with increased seismic activity, suggest that recent magma injection has occurred in the upper crust beneath the Alban Hills volcano. ¿ American Geophysical Union 1995