This chapter describes the processes of attentional control and contrasts the effects of attention on perceptual processing versus the control of attentional orienting. PET, fMRI, and single-unit recordings have identified a bilateral dorsal attention network (DAN) that controls the orienting of attention and a ventral attention network (VAN) that is critical for the reorienting of attention. The intraparietal sulcus (IPS) and frontal eye fields (FEF) have been found to be core elements of the DAN, and the temporal parietal junction (TPJ) and ventral frontal regions are consistently found to be part of the VAN. Internally generated attention, or willed attention, is contrasted to exogenous attention and externally triggered endogenous attention. New methods of analyzing patterns of brain connectivity that hold promise for helping understand individual and group differences in attentional control are described. Neurostimulation studies (e.g., tACS; cTBS; TMS) that are providing evidence for the causal involvement of DAN and VAN to attentional control are discussed, and ERP indices of attention control processes (such as the EDAN, ADAN, and LDAP components) and of executive monitoring (such as the ERN and FRN components) are described. Finally, this chapter discusses the plasticity of attention and brain training techniques such as meditation, neurofeedback, and video games.