Forty-seven fine-structure levels belonging to theLSstates 3s23p4 3P,1D,1S, 3s3p5 3P,1P, 3s23p3(4S)3d3,5D, 3s23p3(2P)3d1,3P,1,3D,1,3F, and 3s23p3(2D)3d1,3S,1,3P,1,3D,1,3F,1,3Gare calculated using configuration–interaction wave functions. Level energies are calculated bothab initioand with inclusion of adjustment of the diagonal elements of the Hamiltonian to experimental energy level values. The adjusted energies are used in the calculation of oscillator strengths for the electric dipole allowed and intercombination transitions among the various levels of Fe XI. The present results are compared with available theoretical and experimental results wherever possible. We find that ourab initioenergy levels for the most part agree to within 2% with measurement. The present oscillator strengths also agree fairly well with the existing theoretical results for most transitions. However, some differences are noted among the results of various calculations, particularly for transitions where the oscillator strengths are relatively small.