This chapter studies the labour market integration of immigrants in Norway from lower-income countries and assesses whether their integration process is influenced by acquisition of Norwegian citizenship. It finds that there is no positive effect of citizenship on the labour market status of immigrants. For some groups, there are even small, but statistically significant, negative effects on employment and earnings when estimated with individual fixed effects to account for unobserved heterogeneity. The chapter also discusses the discrepancy between these findings and prior evidence from the United States in light of possible causal mechanisms and differences in the labour market institutions of the two host countries.