In this chapter we will discuss electrical properties of nanorods both on a single particle level and for nanorod assemblies and thin films consisting of densely aggregated nanorods. We will deal only with semiconductor nanorods, and, like in the previous chapter, we will focus mostly on the CdSe material system as an example to explain the physical properties, since CdSe nanorods have been studied in great detail. We will not discuss explicitly the electrical properties of metallic nanorods, but we treat the double barrier tunnel junction Double Barrier Tunnel Junction (DBTJ) configuration and Coulomb blockade effects, which are the major factors that dominate the conductive behavior of metal nanostructures. Different contact schemes to single nanorods and their ensembles will be discussed, comprising vertical scanning probe experiments and planar electrode geometries, in both weak and strong coupling …