- Geranium paishanense
- Geranium palcaense
- Geranium pallidifolium
- Geranium palmatipartitum
- Geranium palmatum – Canary Island Geranium
- Geranium paludosum
- Geranium palustre – Marsh Cranesbill
- Geranium pamiricum
- Geranium papuanum
- Geranium paramicola
- Geranium parodii
- Geranium patagonicum
- Geranium pavonianum
- Geranium peloponnesiacum
- Geranium persicum
- Geranium peruvianum
- Geranium petri-davisii
- Geranium pflanzii
- Geranium phaeum – Dusky Cranesbill, Mourning Widow
- Geranium phaeum var. lividum
- Geranium phaeum var. phaeum
- Geranium philippii
- Geranium pichinchense
- Geranium pilgerianum
- Geranium pinetophilum
- Geranium piurense
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- Geranium platyanthum
- Geranium platypetalum – Broad-petaled Geranium
- Geranium platyrenifolium
- Geranium pogonanthum
- Geranium polyanthes
- Geranium ponticum
- Geranium potentillifolium
- Geranium potentilloides – Cinquefoil Geranium, Native Carrot (Australia)
- Geranium potentilloides var. abditum
- Geranium potentilloides var. potentilloides
- Geranium potosinum
- Geranium pratense – Meadow Cranesbill
- Geranium pringlei
- Geranium procurrens
- Geranium pseudofarreri
- Geranium pseudosibiricum
- Geranium psilostemon – Armenian Cranesbill
- Geranium pulchrum
- Geranium purpureum – Little Robin
- Geranium pusillum – Small-flowered Cranesbill, Small Geranium
- Geranium pylzowianum
- Geranium pyrenaicum – Hedgerow Cranesbill, Hedgerow Geranium
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