Two compact switchless dual-band load networks for class-E power amplifier (PA) operating at 800 and 1900 MHz are proposed, featuring small area and low loss which will be suitable for non-concurrent dual-band PA module in handset. Theoretical analysis and design equations are provided along with a loss model, including loss in the transistor and in the load network. Loss model is extracted for each structure to find the design parameters for optimized and balanced efficiency in both bands. Both designs are fabricated on Rogers RO4003 substrate with lumped components. Full PA simulations of both bands are carried out with co-simulation using a Triquint TGF2023-2-10 GaN transistor model, lumped components and EM models of load network layouts for both structures. The PA with transformer-based load network achieves a power added efficiency of 68.6 % at low band and 62.6 % at high band at an output power of 37.8 and 36.7 dBm respectively. The overall area consumed by the load network is 13.5 × 9.6 mm2. The LC-based PA has a similar PAE of 68.3 and 60 % at low band and high band, respectively. The output power is 38.1 dBm in the low band and 37 dBm in the high-band. The overall area consumed by the load network is 9 × 10 mm2