American Militia Cavalry during the War of 1812 were wealthier men that could afford to equip themselves. The cavalry from Kentucky and Illinois wore hunting shirts, most other states had a variety of uniforms, we know the uniforms of about half of these. Overall, most uniformed cavalry had tartelans, stovepipe shakos, or a horse hair crest similar to the American line dragoons. All of the head gear used by cavalry in Europe were probably used by militia cavalry units. Companies were typically 30 to 50 men, units larger than that were almost always combined from 2 to 6 volunteer companies often all with different uniforms.
The plates shown below were created by "The War of 1812 Uniform Blog", that are relevant to the the Battle of Bladensburg. I have also included some plates from Osprey and Renee Chartrand. At the end of this post I will list what numbers I would use for 1 man equals 15 for this battle. I am using "Chesapeake Campaigns 1813-1815" as my primary source. This source contradicts every other source I have regarding the order of battle for the DC cavalry present. I am inclined to think that the other sources are correct.
Most of their uniforms are unknown. Maryland state rules were that cavalry were to have a fur covered tartelan, and a dark blue jacket with braiding. Though at North Point, the majority seemed to be wearing stovepipe type shakos. Militia cavalry often came up with their own uniforms.
There are 2 possibilities for the Maryland Cavalry. The first is my conjecture based on the fact the the "1st Harford County Light Dragoons" had their standard captured at the battle.
7th Maryland Cavalry District; Harford County-Lt. Col. / Major Unknown
Unknown Type; Captain Smith's Troop
Unknown Type; Captain Jenkin's Troop
Unknown Type; Captain Lee's Troop
Unknown Type; Unknown if 4th Troop existed
*As mentioned the 1st Harford County Light Dragoons definitely had their standard captured by the British at the Battle of Bladensburg, this leads me to believe that these were troops were present. Some sources specify that it was the 7th Harford County District that was present at the battle.
OR below based on The Chesapeake Campaigns by Osprey Publishing (probably incorrect)
1st Maryland Cavalry District-Lt Col Frisby Tilghman
Unknown Type; Maj. Otho WIlliams
Unknown Type; Captain Moses Tabb's Co.
Washington Hussars; Capt. Edward G.Williams
2nd Maryland Cavalry District
Bladensburg Troop of Horse; Capt. John C. Hebert
5th Maryland Cavalry District
Baltimore Light Dragoons; Lt. Jacob Hollingsworth
1st Baltimore Hussars; Capt. James Sterrett (uniform in plate below)
*Ether way since the uniforms for the Maryland cavalry at Bladensburg are mostly unknown, I would use the uniforms that are known for Maryland from North Point combined with state regulations.
Alexandria Dragoons (seen above)
Osprey lists the following units as being present. I don't think this is correct. Every other source just states 40 to 50 DC Dragoons. The Alexandria Dragoons are named in many sources, I think they were probably the only DC troop present.
Total DC Cavalry (Probably NOT Present at Battle) Incorrect Information from Osprey IMO.
Washington Light Horse; Capt. Elia B.Caldwell
Georgetown Hussars; Capt. John C. Williams
Fairfax Light Dragoons; Capt. George Graham
Columbian Hussars; Capt. William G. Ridgely
Washington Troop; Unknown Command
2 Hussars, 1 Light Dragoons, 1 Dragoons, 1 Light Horse, 1 Unknown
I would use the Perry American War of Independence 16th Light Dragoons
Maryland 1st, 2nd and 5th Districts; 240 men 3, 4 or 6 Companies (18 models)
2 Hussars, 2 Light Dragoons, 1 Troop of Horse, 1 Unknown
*X 6 Perry Plastic British Light Dragoons (Maryland Light Dragoons Uniform with Tartelons)
*X 6 Perry Plastic British Light Dragoons (Maryland Light Dragoon Uniform with Stove Pipe type hat)
District of Columbia Cavalry; 50 men; 1 Companies (3 models)
*X 3 Perry 3rd Continental Dragoons AWI (DC Alexandria Dragoons Uniform)
*X 9 Brigade Games or Knuckleduster American Light Dragoons plus a command figure. (10 total)
Virginian Light Dragoons; 100 men;
*X 6 Perry 16th Light Dragoon American War of Independence Models
*It is unclear, but it's possibly the reserve cavalry may have been combined in the second line as well.