The plan set out in a new report Connecting the Capital sets out plans for crossings from Fulham in the west to Dartford in the east.
Coinciding with its publication Transport for London also launched a consultation on two of the biggest proposed new Thames crossings in the east of London.
The first proposal is for a crossing at Gallions Reach to link Thamesmead and Beckton.
The second is for a crossing at Belvedere, linking Belvedere to Rainham.
Both are billed as multimodal crossing and at this stage could be either tunnels or major bridges offering a range of transport options.
The new London plan would increase the total number of river crossings by more than a third, and the number for pedestrian and cyclists by nearly 50%.
The Mayor of London, Boris Johnson MP, said: “Building a series of new bridges and tunnels across the Thames is essential for the future prosperity of our rapidly-growing city.
“By creating more links between the north and south of the river, we won’t just improve day-to-day travelling across the Capital, we’ll unlock areas for development and create thousands of jobs and homes.”
The majority will be in east London, where population growth will be highest – with over one third of London’s total population growth expected in the area.
Existing cross-river connections in east London are poor, with just three road crossings in the 23km between Tower Bridge and the M25, and just one bus route that crosses the river.
13 new ways to cross the Thames
Diamond Jubilee – Pedestrian and cycle bridge linking Fulham with Battersea (Status: planning permission)
Crossrail 2 – Rail tunnel as part of Crossrail 2 between Clapham Junction and Victoria (feasibility)
Nine Elms to Pimlico – Pedestrian and cycle bridge linking Vauxhall, Nine Elms and Battersea to Pimlico (feasibility)
Garden Bridge – Pedestrian crossing linking the South Bank to Temple station (planning permission)
Rotherhithe to Canary Wharf – Pedestrian and cycle crossing linking Rotherhithe to Canary Wharf (feasibility)
North Greenwich to Isle of Dogs – Pedestrian and cycle crossing linking North Greenwich and the Isle of Dogs (conceptual)
Silvertown Tunnel – Twin-bore road tunnel connecting Silvertown on the north side to theBlackwall Tunnel approach on the south side (application under preparation)
Charlton – A crossing linking the Royal Docks and Charlton Riverside (conceptual)
Crossrail – A rail line linking Woolwich with Custom House and onward, to Central London and Heathrow (construction)
Gallions Reach – Multi-modal crossing linking Thamesmead with Gallions Reach along a safeguarded alignment (feasibility)
Barking Riverside to Thamesmead – A London Overground tunnel extension from Barking Riverside to Thamesmead (conceptual)
Belvedere – Multi-modal crossing connecting Belvedere with Rainham (feasibility)
Lower Thames Crossing – Road crossing linking Essex and Kent (feasibility)
Subject to funding, the new crossings will be progressed across London to be delivered between now and 2050.