The upcoming election for the Maryland General Assembly has produced a bumper crop of 14 candidates for three delegate seats from District 14, which straddles the Montgomery-Howard county line.

Also up for grabs in the district is the Senate seat of former Senate president James Clark Jr., who is retiring after 28 years.

Vying for delegate in the split district, which stretches from central Montgomery to northeastern Howard, are a total of 14 incumbents, political novices and perennial hopefuls.

Three Democratic candidates and a sole Republican are running for the state Senate seat representing both subdistricts.

Subdistrict 14A, which includes the communities of Brookeville, Olney and Burtonsville as well as the northernmost tip of Silver Spring, is represented by one delegate. Subdistrict 14B, which extends from upper central Montgomery and extends into a major portion of Howard to the northeast, is represented by two delegates.

Montgomery and Howard are fast-growing jurisdictions where development, transportation and education have been dominant issues in recent campaigns.

The expansion of the Rte. 29 corridor, one of the principal arteries serving the district, and an explosive boom in development in Montgomery lead the list of issues in this year's campaign.

Residents of the counties are among the most affluent in the state. In Montgomery the average household income is about $42,000; in Howard it is $31,000.

The Democratic candidates for the Senate seat are Hugh Burgess, 56, of Ellicott City, Frank Blunda, 53, of Unity, and Del. Edward J. Kasemeyer, 41, of West Friendship, all in Howard.

Columbia resident Chris McCabe, 29, a contract administrator with a Gaithersburg satellite communication company, is the only Republican running for the Senate in the strongly Democratic district. McCabe, the youngest candidate in the campaign, has been active in the Howard County GOP and is treasurer of his party's central committee.

Kasemeyer is a real estate broker from Clark's district who is just completing his freshman term. In the last legislative session, Kasemeyer was chairman of the subcommittee on health insurance and was a member of the House committee on economic matters.

Burgess, a former delegate from Subdistrict 14B who served in the legislature for four terms, was defeated by Kasemeyer and Republican Robert Kittleman in the 1982 general election. A lawyer, Burgess is stressing his experience in the legislature.

Blunda, a budget analyst for AT&T, has been active in Montgomery Democratic affairs for eight years. In what appears to be a well-organized campaign, Blunda has made an early pitch for increased funding of educational programs in the county and has called for higher starting salaries for teachers.

In Subdistrict 14A, Democratic Del. Joel Chasnoff is squaring off against Myriam Bailey, 39, Dennis Lavallee, 37, and Clifton Campbell, 36, all of Silver Spring.

Patricia Faulkner, 41, an insurance agent and former teacher, is the only Republican candidate running for the delegate seat in Subdistrict 14A. Faulkner is the district representative to the Republican Central Committee and had served as the second vice chair of the Montgomery County Young Republicans

Campbell, 36, a paralegal for the Legal Aid Bureau in Baltimore, lives in Silver Spring and has been active in civic and community groups.

Bailey, a native of Puerto Rico, is the senior attorney for the Montgomery County Council and a clinical law professor at Georgetown University Law Center. Bailey also served as legislative counsel for the Maryland General Assembly and for joint committees in the legislature between 1979 and 1983.

The past three Democratic primaries in Subdistrict 14A have been won by Chasnoff, a Colesville attorney who has served as a member of the House Judiciary Committee and on several commissions on health care and insurance matters.

Lavallee, a past president of the Alliance for Democratic Reform, is the director of government affairs for the National Association of Plumbing, Heating and Cooling Contractors. He recently accused Democratic Party leaders of "back room" politicking when they drafted a slate of candidates for offices ranging from sheriff to state senator that excluded some Democrats who he said have been active.

In Subdistrict 14B, Republican Del. Robert Kittleman will be trying to retain the seat he won in 1982. He was the first GOP delegate elected from Howard County in 60 years.

Kittleman, 60, is a retired electrical engineer for Westinghouse Corp. and a member of the House Committee on Economic Matters.

In Subdistrict 14B, candidates registered with the two parties have entered the race claiming affiliation with political extremist Lyndon LaRouche. Democrat Bushrod W. Hopkins, a 70-year-old cattle farmer, and Leonard B. Mattingly, who is registered as a Republican, are running under the banner of the National Democratic Party, which LaRouche heads.

The Democratic candidates in Subdistrict 14B are Columbia resident Sue-Ellen Hantman, 41, a Howard County assistant state's attorney; Arnold J. Elmore, 41, also of Columbia, who is active in scouting and youth athletic programs; E. Alexander Adams, 40, an attorney from Clarksville, and Glen Fallin, 45, a lawyer and former journalist who lives in Ellicott City.

Adams and Hantman ran for the Democratic nomination in 1982 and were defeated in the primary.

The other Republican candidates in Subdistrict 14B who are new to elective politics are attorney Robert Flanagan, 40, of Columbia, a member of the Howard County Human Rights Commission; Mattingly, and Henry C. Marshall, 61, a Clarksville businessman who heads voter registration efforts in the county for his party's central committee.