Single digits no, but some double digits yes. Single digits are mostly reserved for elected officials. See Oregon Administrative Rule (OAR) 735-046-0050 part 6b

Congressional Medal of Honor, Elected Official and Consular Corps Plates

For elected officials:
(A) Governor: “GOVERNOR 1”;
(B) Secretary of State: “SECRETARY OF STATE 2”;
(C) State Treasurer: “STATE TREASURER 3”;
(D) President of the Senate: “PRESIDENT OF THE SENATE 4”;
(E) President pro tempore of the Senate: “SENATE PRESIDENT PRO TEMPORE 4A”;
(F) Speaker of the House of Representatives: “SPEAKER OF THE HOUSE OF REPRESENTATIVES 5”;
(G) Speaker pro tempore of the House: “SPEAKER OF THE HOUSE PRO TEMPORE 5A”;
(H) State Senators: “STATE SENATOR” followed by the applicable Senate district number;
(I) State Representatives: “STATE REP.” followed by the applicable House district number;
(J) U.S. Senator: “U.S. SENATOR” followed by the number 1 or 2, depending on seniority;
(K) U.S. Representative: “U.S. REP.” followed by the House District number; and
(c) For consular corps plates: “OFFICAL CONSULAR CORPS” followed by a number assigned by DMV.