We have 290 municipalities, though.
You mean cities ?? The definitions between countries may be different.
In Los Angeles, a municipality is a district within L.A. city limits. My sister lives in Sherman Oaks. If you call the cops there, the L.A.P.D. shows up. Same with Fire Dept. Hollywood is another municipality within L.A. city limits.
I think a city in anglosaxon countries must have at least 100000 inhabitants. We only have about a dozen of cities in Sweden in that case. Until 1971, Sweden had 132 chartered towns and some hundred townships or rural districts. Originally there was about 2600 townships and rural districts in Sweden, each for one parish in principle. But 1971, all chartered towns, townships and rural districts became "greater municipalicites" or "greater communes", about 270. Since then, some old municipalities have ceded from the greater ones. Now they are 290.
I think a municipality in Swedish terms is something that has some functions of a US town and some functions of a US county, if you understand what I mean. A Swedish county on the other hand is more like a province than a US county.