Knowledge management (KM) is recognized as an important means for attaining competitive advantage and improving organizational performance. The evaluation of KM performance has become increasingly vital, as it provides the direction for organizations to enhance their performance and competitiveness. A survey was carried out to test the applicability of 14 constructs based on knowledge resources, KM processes, and KM factors in measuring the KM performance for small and medium enterprises (SMEs) in Malaysia. This article intends to further explore the effects of company size (micro, small, and medium) and KM maturity on knowledge management performance measurement (KMPM). Two-way analysis of variance results indicate that company size and KM maturity do affect some aspects of KMPM in SMEs.