Circle: Unity among people of Lumban.
Shield: From the Provincial Seal of Laguna where the town is located.
Sun and Rays: Bright hope of the municipality through unity of its sixteen (16) Barangays.
Tree: Most prominent feature of the seal; "Lumbang" tree, from which town derived its name.
Mountain: Strong will and determination of Lumbenos.
Scroll: Knowledge that is carried down from generation to generation.
Honorem et Dignitas: Latin for "Honor and Dignity".
1578: Year when the town was established as civil entity.
Barong Tagalog: Town is noted for its fine hand embroidered Barong Tagalog.
Anvil: High quality bolos produced in municipality.
Fish: Rich aquatic resources of Lumban (Lumban river, Caliraya lake and Laguna de Bay).
Lightning Bolt: Electricity; Caliraya Hydro Electric Power Plant, the first of its kind in the country.
Monstrance: First ever exposition of Holy Eucharist outside Manila; Lumban was the cradle of Christianity in Laguna and first stone church built outside Manila.
Harp: First academy of music in the country that was established in 1606.
Laguna Copper Plate: Country's earliest known written documents found in Lumban River, an evidence of ancient Filipino and Lumbeño civilization.