| Emblazonment | Name | Blazon | Comments | Source |
| | Kasson, Adam (of Boston, MA, 1722) | Argent, three chevrons and a canton Gules, on each chevron a mullet Argent | Same as Kissam (see below) | Matthews |
| | Kay, Nathaniel (of Newport, RI, 1727) | Argent, two bendlets Sable | Seal. | Bolton,Matthews |
| | Kean, John (of South Carolina and Pennsylvania, 1756) | Argent, a chevron between two doves Sable | | Crozier 1 |
| | Keayne (Kane), Capt. Robert (of Boston, MA, 1635) | Azure, an eagle displayed Argent | | Bolton,Matthews |
| | Keeble, George (of Middlesex County, VA, 1698) | Argent, a chevron engrailed Gules, on a chief Azure, three escallops Argent | Wax seal on deed. | Crozier 2, Bolton |
| | Kelker, Henry (to Lebanon, Pa., 1743) | Per pale, dexter Gules a boathook Or, sinister paly of four Argent and Sable. | From Herrliberg, Canton Zurich, Switzerland. | NEHGS #595 |
| | Kelley, Thomas (of Salem, NJ, 1664) | Gules, a tower triple towered, supported by a lion on each side Or | | Crozier 1,Matthews |
| | Kelly, William (of Paterson, NY, 1806) | Azure, two lions rampant combatant Argent, chained Or, supporting a tower triple turreted Argent | | Crozier 1 |
| | Kelly, William (of New Hampshire, 1767) | Argent, a chevron between three billets Gules | Bookplate | Bolton |
| | Kempe, Richard (d. Virginia, 1649) | Gules three garbs and a bordure engrailed Or | Secretary of State for Virginia, 1637. | Crozier 2 |
| | Kendall, Thomas (of Pennsylvania, 1700) | Per bend dancetty Argent and Sable | | Matthews |
| | 1. Kent, Richard (of Newburyport, MA, 1634)
2. Kent, Stephen (of Newburyport, MA, 1634) | Azure, a lion passant guardant Or, a chief Ermine | | Crozier 1 |
| | Kenyon, Roger (of Block Island, RI, by 1683) | Sable a chevron engrailed Or between three crosses flory Argent. | | NEHGS #79 |
| | von Ketel, Joachim (of New York, NY, 1642) | Per pale, dexter chequy Sable and Or, of four rows, three each; sinister Or, fifteen hurts in five rows of three each | | Crozier 1,Matthews |
| | Kilpatrick, Andrew (of Philadelphia, PA, 1816) | Argent, a saltire a chief Azure, the last charged with three cushions Or | | Crozier 1 |
| | Kimball, Richard (of Watertown, MA, 1634) | Argent a fess within a bordure engrailed Sable | | Matthews |
| King, Maj. Rufus (b. Scarborough, ME, 25 March 1755; d. Jamaica, NY, 29 April 1827) | Sable a lion rampant Ermine between three crosses paty fitchy Or. | Signer of the Constitution; U.S. Senator for New York, U.S. Minister to Great Britain. Arms of King of Bromley, Kent; used on silver. | Bolton,Matthews |
| | 1. King, William (b. 1595; d. Salem, MA, 1651);
2. King, James (of Suffield, CT, 1721) | Sable, on a chevron between three crosses-crosslet Or three escallops Sable | 2. Arms on a deed. | Crozier 1, Bolton |
| | King, Miles (b. 2 Nov. 1747; d. Norfolk, VA, 19 June 1814) | Or, three pheons Sable | Arms on his bookplate | Bolton, Crozier 2 |
| | Kingsley, John (of Dorchester, MA, 1635) | Vert, a cross engrailed Ermine | | Crozier 1 |
| | Kingsmill, Richard (of James City County, VA, 1624) | Argent, a semy of crosses-crosslet fitchy Sable, a chevron Ermine, between three fers de Moline Sable, a chief Ermine | Arms on the tomb of his daughter impaled with her husband’s. | Crozier 1 |
| | Kinlock, Capt. Francis (b. Charleston, SC, 7 March 1755; d. Charleston, SC, 8 Feb. 1826) | Azure, a boar’s head couped between three mascles Or | Continental Congress, South Carolina delegate, served in Revolutionary War. | Bolton |
| | 1. Kip, Isaac (of New York, NY, 1657);
2. Kip, Henry, (of New York, NY, 1635);
3. Kip, Leonard b. 1768; d. New York, 1843) | Azure a chevron Or between two griffins sejant respectant in chief and a dexter hand couped in base all Argent. | 3. Bookplate. | 1. & 2.Crozier 1
2.Matthews
3. Bolton |
| | Kirkbride, Joseph (of Bucks County, PA, 1682) | Argent, a cross engrailed Vert | | Crozier 1 |
| | Kissam, John (of Flushing, NY, 1667) | Argent, three chevrons and a canton Gules, on each chevron a mullet Argent | Same as Kasson (see above) | Crozier 1 |
| | Knight, Jonathan (b. 1758; of Norwich, CT) | Sable, a griffin sergeant Or | Arms on his bookplate. | Bolton |
| | 1. Knowlton, John (of Ipswich, MA, 1639);
2. Knowlton, Col. Thomas (of Connecticut, 1740) | Argent, a chevron Gules, between three ducal coronets Sable | | 1. Crozier 1
Matthews |
| | Kunkel, John Michael (of Lancaster County, PA, 1749) | Per fess Or and Sable, on a mound Vert, a lion couchant supporting a mullet Argent in base | | Crozier 1, Matthews |
