The list of shipwrecks in April 1821 includes ships sunk, wrecked, or otherwise lost during April 1821. 
   1 April
   List of shipwrecks: 1 April 1821   | Ship |  State |  Description  | 
  | Trio  |    United Kingdom  |  The ship was driven ashore at Great Yarmouth, Norfolk.[1] She was refloated on 10 April and taken in to Great Yarmouth for repairs.[2]  | 
  2 April
   List of shipwrecks: 2 April 1821   | Ship |  State |  Description  | 
  | Flora  |    United Kingdom  |  The ship was driven ashore and wrecked in the King Road. She was on a voyage from Bristol, Gloucestershire to New Brunswick, British North America.[3] Flora was later refloated.[4]  | 
  | Golden Fleece  |    United Kingdom  |  The ship was wrecked on the Goodwin Sands, Kent. Her crew were rescued. She was on a voyage from South Shields, County Durham to Ramsgate, Kent.[1]  | 
  | Hope  |    United Kingdom  |  The ship capsized and sank in the Thames Estuary off Leigh-on-Sea, Essex. She was on a voyage from Harlingen, Friesland, Netherlands to London. Hope was later refloated and taken in to London.[5]  | 
  | Magnet  |    United States  |  The ship was driven ashore at Liverpool, Lancashire, United Kingdom. She was refloated on 30 April and taken in to Liverpool.[6]  | 
  3 April
   List of shipwrecks: 3 April 1821   | Ship |  State |  Description  | 
  | Adolphe  |    France  |  The ship was driven ashore and wrecked at Padstow, Cornwall, United Kingdom.[4]  | 
  | Freundschaft  |    Lübeck  |  The ship was driven ashore and wrecked at Rye, Sussex, United Kingdom with the loss of seven of her crew. She was on a voyage from Málaga, Spain to Lübeck.[3]  | 
  | Goede Hoop  |    Netherlands  |  The ship was wrecked on Ameland, Friesland with the loss of all hands. She was on a voyage from Hull, Yorkshire, United Kingdom to Groningen.[7]  | 
  | Spring  |    United Kingdom  |  The ship foundered in the Atlantic Ocean off Campos dos Goytaczes, Brazil.[8]  | 
  | Tom & Margaret  |    United Kingdom  |  The ship was wrecked on the Kentish Knock. Her crew were rescued. She was on a voyage from Sunderland, County Durham to Portsmouth, Hampshire.[3]  | 
  4 April
  5 April
  6 April
  7 April
  8 April
  9 April
   List of shipwrecks: 9 April 1821   | Ship |  State |  Description  | 
  | Doris  |    France  |  The ship was lost at Guadeloupe.[14]  | 
  10 April
  12 April
  13 April
  14 April
  15 April
  17 April
  18 April
  19 April
  22 April
  24 April
  25 April
  27 April
  28 April
   List of shipwrecks: 28 April 1821   | Ship |  State |  Description  | 
  | Hall  |    United Kingdom  |  The ship was driven ashore at Havana, Cuba. She was on a voyage from Jamaica to Liverpool, Lancashire. Hall was refloated on 3 July and taken in to Havana for repairs.[28]  | 
  29 April
   List of shipwrecks: 29 April 1821   | Ship |  State |  Description  | 
  | Fly  |    United Kingdom  |  The ship ran aground in The Wash off King's Lynn, Norfolk and sank. Her crew were rescued. She was on a voyage from Newcastle upon Tyne, Northumberland to King's Lynn. Fly was later refloated and taken in to King's Lynn.[6]  | 
  | Hall  |    United Kingdom  |  The ship was driven ashore at Havana, Cuba. She was on a voyage from Jamaica to Liverpool, Lancashire.[29]  | 
  | Lord Cathcart  |    United Kingdom  |  The ship sprang a leak and foundered in the Atlantic Ocean (45°38′N 26°47′W / 45.633°N 26.783°W / 45.633; -26.783) Her crew were rescued by Neptune (  United Kingdom). She was on a voyage from London to Quebec, British North America.[30]  | 
  | Neath Castle  |    United Kingdom  |  The ship ran aground and sank at Dover, Kent. She was on a voyage from Portsmouth, Hampshire to Deptford, Kent.[17]  | 
  | Teat's Hill  |    United Kingdom  |  The ship struck the Black Rock and foundered. She was on a voyage from Plymouth, Devon to Falmouth, Cornwall. She was later refloated and taken in to Falmouth.[6]  | 
  30 April
  Unknown date
   List of shipwrecks: Unknown date 1821   | Ship |  State |  Description  | 
  | Margaretta  |    Kingdom of Hanover  |  The ship was lost off the coast of Greenland in mid-April.[33]  | 
  | Marsh  |    United Kingdom  |  The ship ran aground off Carriacou and was wrecked in early April. She was on a voyage from London to Grenada.[34]  | 
  | Neptune  |    United Kingdom  |  The ship was sunk by ice off Baltic Port, Russia before 11 April. She was on a voyage from Messina, Sicily to Saint Petersburg, Russia.[31]  | 
  | Standhaftighed  |    Netherlands  |  The ship was wrecked near "Schermoeke". She was on a voyage from "Swelvig" to Amsterdam, North Holland.[17]  | 
  | Waterloo  |    United Kingdom  |  The ship was wrecked at Philadelphia, Pennsylvania, United States at the end of April. She was on a voyage from Havana, Cuba to Rotterdam, South Holland, Netherlands.[12]  | 
  | Wright  |    United Kingdom  |  The ship sank near Whitehaven, Cumberland. She was on a voyage from Donaghadee, County Antrim to Whitehaven.[3]  | 
  References
   - ^ a b "The Marine List". Lloyd's List (5580). 3 April 1821. 
  - ^ "The Marine List". Lloyd's List (5584). 17 April 1821. 
  - ^ a b c d e "The Marine List". Lloyd's List (5581). 6 April 1821. 
  - ^ a b c d "The Marine List". Lloyd's List (5582). 10 April 1821. 
  - ^ a b c d e f g "Lloyd's Marine List – April 10". Caledonian Mercury. No. 15543. 16 April 1821. 
  - ^ a b c d e f g "Lloyd's Marine List – May 4". Caledonian Mercury. No. 15552. 12 May 1821. 
  - ^ a b c d e f "Lloyd's Marine List – April 17". Caledonian Mercury. No. 15546. 23 April 1821. 
  - ^ a b "Lloyd's Marine List – July 13". Caledonian Mercury. No. 15580. 16 July 1821. 
  - ^ a b "Naval Intelligence". Liverpool Mercury etc. No. 516. 20 April 1821. 
  - ^ "The Marine List". Lloyd's List (5596). 29 May 1821. 
  - ^ "The Marine List". Lloyd's List (5599). 8 June 1821. 
  - ^ a b c "Lloyd's Marine List – June 8". Caledonian Mercury. No. 15565. 11 June 1821. 
  - ^ a b c "The Marine List". Lloyd's List (5587). 27 April 1821. 
  - ^ "Ship News". The Morning Post. No. 15676. 13 June 1821. 
  - ^ "Ship News". The Morning Post. No. 15691. 30 June 1821. 
  - ^ a b c "Ship News". The Morning Post. No. 15634. 25 April 1821. 
  - ^ a b c d "The Marine List". Lloyd's List (5588). 1 May 1821. 
  - ^ "Lloyd's Marine List – Oct. 5". Caledonian Mercury. No. 15616. 8 October 1821. 
  - ^ "The Marine List". Lloyd's List (5585). 20 April 1821. 
  - ^ "(untitled)". The Times. No. 11224. London. 19 April 1821. col D, p. 3. 
  - ^ "Lloyd's Marine List – July 20". Caledonian Mercury. No. 15583. 23 July 1821. 
  - ^ "Ship News". The Morning Post. No. 15627. 17 April 1821. 
  - ^ a b "The Marine List". Lloyd's List (5590). 5 May 1821. 
  - ^ "The Marine List". Lloyd's List (5592). 15 May 1821. 
  - ^ "Lloyd's Marine List – Aug. 3". Caledonian Mercury. No. 15589. 6 August 1821. 
  - ^ "The Marine List". Lloyd's List (5613). 27 July 1821. 
  - ^ "Lloyd's Marine List – June 19". Caledonian Mercury. No. 15570. 23 June 1821. 
  - ^ "The Marine List". Lloyd's List (5616). 8 August 1821. 
  - ^ "Naval Intelligence". Liverpool Mercury etc. No. 524. 15 June 1821. 
  - ^ "Lloyd's Marine List – June 26". Caledonian Mercury. No. 15573. 30 June 1821. 
  - ^ a b "The Marine List". Lloyd's List (5589). 4 May 1821. 
  - ^ "The Marine List". Lloyd's List (5600). 12 June 1821. 
  - ^ "Lloyd's Marine List – July 3". Caledonian Mercury. No. 15577. 9 July 1821. 
  - ^ "The Marine List". Lloyd's List (5597). 1 June 1821. 
  
   Shipwrecks 1820–29, by month  | 
|---|
| 1820 |  | 
|---|
| 1821 |  | 
|---|
| 1822 |  | 
|---|
| 1823 |  | 
|---|
| 1824 |  | 
|---|
| 1825 |  | 
|---|
| 1826 |  | 
|---|
| 1827 |  | 
|---|
| 1828 |  | 
|---|
| 1829 |  | 
|---|