Information on 505 taxa of wild-growing vascular plants from the Town of Belomorsk is reported. Generalized habitat types and frequency of occurrence are stated for each taxon. Herbarium labels stating the sample storage location are cited for the rarest and most phytogeographically interesting species, and comments are given on their distribution in the region. Nine species listed in the Red Data Book of the Russian Federation (2008) and/or Red Data Book of Karelia (2007) have been found in Belomorsk: Elatine triandra, Isoёtes echinospora, Moehringia lateriflora, Oxytropis sordida, Potamogeton friesii, Ranunculus reptabundus, Rhodiola rosea, Schoenoplectus tabernaemontani, and Tillaea aquatica. Five vascular plant taxa have not previously been reported from the Republic of Karelia, including one native (Juniperus х niemannii) and four non-native taxa (Crataegus flabellata, Linaria incarnata, Salix х fragilis, Syringa josikaea). For some native (Callitriche stagnalis, Iris pseudacorus, Persicaria hydropiper, Potamogeton friesii, Tillaea aquatica) and non-native (Alchemilla litwinowii, Calystegia spectabilis, Caragana arborescens, Collomia linearis, Cotoneaster lucidus, Daucus sativus, Dianthus barbatus, Draba nemorosa var. hebecarpa, Epilobium pseudorubescens, E. roseum, Eschscholzia californica, Geranium sibiricum, Helianthus tuberosus, Hippophaё rhamnoides, Humulus lupulus, Impatiens glandulifera, Lonicera tatarica, Lotus callunetorum, Lupinus polyphyllus, Mentha dalmatica, Narcissus poëticus, Papaver pseudoorientale, P. somniferum, Phacelia tanacetifolia, Physocarpus opulifolius, Populus laurifolia, Ribes rubrum, Rumex stenophyllus, Sambucus racemosa, Spiraea х pseudosalicifolia, Symphyotrichum novi-belgii, Symphytum asperum, Syringa vulgaris) taxa Belomorsk is the northernmost known location in Karelia.